Patent US6360320B2 successfully refreshed from Google Patents.
US6360320B2
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Information processing apparatus, information processing method, information processing system and recording medium using an apparatus id and provided license key for authentication of each information to be processed
Assignee: Sony Corp
•
Filing: 1998-04-14
•
Granted: 2002-03-19
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Expires: 2018-04-14
Abstract
Abstract A hash function and a service key are stored in advance in an EEPROM of a DVD player serving as a source. In an EEPROM of a personal computer (PC) serving as a sink, on the other hand, its ID and a license key are stored beforehand. The DVD player requests the PC to transmit the ID. The DVD player then applies the hash function to data resulting from concatenation of the ID with the service key to generate a license key(=hash(ID∥service13 key)). Subsequently, the DVD player generates a source side session key and encrypts the session key by using the generated license key. Then, the DVD player transmits the encrypted source side session key to the PC. The PC decrypts the encrypted source side session key by using the license key stored in its EEPROM to produce a sink side session key which has a value equal to that of the source side session key.
Inventors
- 👤 Ryuji Ishiguro
- 👤 Yoshitomo Osawa
- 👤 Yoshio Osakabe
- 👤 Makoto Sato
- 👤 Hisato Shima
- 👤 Tomoyuki Asano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:04
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/00086; G06; G06F; G06F21/00; G06F21/10; G06F21/30; G06F21/44; G06F21/445; G11B19/00; G11B19/02; G11B19/04; G11B19/12; G11B20/0021; H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/40052; H04L12/40104; H04L12/40117; H04N; H04N21/00; H04N21/40; H04N21/43; H04N21/436; H04N21/4363; H04N21/43632; G06F2211/00; G06F2211/007; G06F2221/00; G06F2221/21; G06F2221/2103; G06F2221/2107
Claims Analysis
Total Claims: 84
Claim 1
Independent Claim
132 words
A data transmitting apparatus wherein data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said data transmitting apparatus comprising: storage means for storing a first code; reception means for receiving a second code assigned to said other equipment from said other equipment and indicative of an identification of said second equipment; first calculation means for calculating a first information by application of a predetermined method to said first code output from said storage means and said second code received from said other equipment output from said reception means; information processing means for encrypting said data using an encryption key shared with said other equipment based upon the first information; and transmission means for transmitting said encrypted data output from said information processing means.
Claim 2
Dependent Claim
132 words
A data transmitting apparatus wherein data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said data transmitting apparatus comprising: storage means for storing a first code; reception means for receiving a second code assigned to said other equipment from said other equipment and indicative of an identification of said second equipment; first calculation means for calculating a first information by application of a predetermined method to said first code output from said storage means and said second code received from said other equipment output from said reception means; information processing means for encrypting said data using an encryption key shared with said other equipment based upon the first information; and transmission means for transmitting said encrypted data output from said information processing means.
Claim 3
Dependent Claim
25 words
A data transmitting apparatus according to claim 1 wherein, in accordance with said predetermined method, a predetermined function is applied a predetermined number of times.
Claim 4
Dependent Claim
22 words
A data transmitting apparatus according to claim 2 wherein said predetermined function is modified in accordance with said predetermined number of times.
Claim 5
Dependent Claim
16 words
A data transmitting apparatus according to claim 3 wherein said predetermined function is a hash function.
Claim 6
Dependent Claim
32 words
A data transmitting apparatus according to claim 1 wherein, in accordance with said predetermined method, a predetermined function is applied and a random number is used in application of said predetermined function.
Claim 7
Dependent Claim
16 words
A data transmitting apparatus according to claim 5 wherein said predetermined function is a hash function.
Claim 8
Dependent Claim
63 words
An encryption apparatus for carrying out encryption, said apparatus comprising: a random number generator for generating a random number; encrypting means for encrypting input data using said random number output from said random number generator, and for generating encrypted data; and processing means for resetting said random number generator when the encrypted data output from said encrypting means is in a predetermined condition.
Claim 9
Dependent Claim
63 words
An encryption apparatus for carrying out encryption, said apparatus comprising: a random number generator for generating a random number; encrypting means for encrypting input data using said random number output from said random number generator, and for generating encrypted data; and processing means for resetting said random number generator when the encrypted data output from said encrypting means is in a predetermined condition.
Claim 10
Dependent Claim
45 words
An encryption apparatus according to claim 7 wherein said processing means compares the encrypted data output by said encrypting means with a predetermined value and resets said random number generator when the encrypted data output from said encrypting means is equal to said predetermined value.
Claim 11
Dependent Claim
34 words
An encryption apparatus according to claim 7 further comprising a second encrypting means for generating final encrypted data by encryption of said encrypted data output from said encrypting means based on a key code.
Claim 12
Dependent Claim
45 words
An encryption apparatus according to claim 7 , wherein said processing means resets said random number generator by setting the encrypted data as the initial value of said random number generator when the encrypted data output from said encrypting means is in a predetermined condition.
Claim 13
Dependent Claim
121 words
A data transmitting method whereby data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said method comprising the steps of: reading out a first code from a storage means associated with said particular transmission device; receiving a second code assigned to said other equipment and indicative of an identification of said other equipment from said other equipment; calculating a first information by application of a predetermined sub-method to said first code read out from said storage means and said second code received from said other equipment; encrypting said data using an encryption key shared with said other equipment based upon said first information; and transmitting said encrypted data completing said predetermined processing.
Claim 14
Dependent Claim
121 words
A data transmitting method whereby data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said method comprising the steps of: reading out a first code from a storage means associated with said particular transmission device; receiving a second code assigned to said other equipment and indicative of an identification of said other equipment from said other equipment; calculating a first information by application of a predetermined sub-method to said first code read out from said storage means and said second code received from said other equipment; encrypting said data using an encryption key shared with said other equipment based upon said first information; and transmitting said encrypted data completing said predetermined processing.
Claim 15
Dependent Claim
24 words
A data transmitting method according to claim 11 wherein, in accordance with said predetermined sub-method, predetermined function is applied a predetermined number of times.
Claim 16
Dependent Claim
22 words
A data transmitting method according to claim 12 wherein said predetermined function is modified in accordance with said predetermined number of times.
Claim 17
Dependent Claim
16 words
A data transmitting method according to claim 13 wherein said predetermined function is a hash function.
Claim 18
Dependent Claim
32 words
A data transmitting method according to claim 11 whereby, in accordance with said predetermined sub-method, a predetermined function is applied and a random number is used in application of said predetermined function.
Claim 19
Dependent Claim
16 words
A data transmitting method according to claim 15 wherein said predetermined function is a hash function.
Claim 20
Dependent Claim
44 words
An encryption method for carrying out encryption, said method comprising the steps of: generating a random number: encrypting input data using said generated random number to generate encrypted data; and resetting said random number when the generated encrypted data is in a predetermined condition.
Claim 21
Dependent Claim
44 words
An encryption method for carrying out encryption, said method comprising the steps of: generating a random number: encrypting input data using said generated random number to generate encrypted data; and resetting said random number when the generated encrypted data is in a predetermined condition.
Claim 22
Dependent Claim
39 words
An encryption method according to claim 17 , further comprising the step of comparing said generated encrypted data with a predetermined value and resetting said random number generator when the generated encrypted data is equal to said predetermined value.
Claim 23
Dependent Claim
29 words
An encryption method according to claim 17 , further comprising the step of: generating final encrypted data by encryption of said generated encrypted data based on a key code.
Claim 24
Dependent Claim
36 words
An encryption method according to claim 17 , wherein said random number is reset by setting the encrypted data as the initial value of said random number when the encrypted data is in a predetermined condition.
Claim 25
Dependent Claim
171 words
A data receiving apparatus for decrypting data received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code and indicative of an identification of said data receiving apparatus assigned to said data receiving apparatus and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, said apparatus comprising: storage means associated with said data receiving apparatus for storing said code assigned to and indicative of said identification of said data receiving apparatus; reception means for receiving said data and first information from said other equipment; and decryption means for decrypting an output of said reception means by using said code assigned to said data receiving apparatus and stored in said storage means as a base.
Claim 26
Dependent Claim
171 words
A data receiving apparatus for decrypting data received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code and indicative of an identification of said data receiving apparatus assigned to said data receiving apparatus and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, said apparatus comprising: storage means associated with said data receiving apparatus for storing said code assigned to and indicative of said identification of said data receiving apparatus; reception means for receiving said data and first information from said other equipment; and decryption means for decrypting an output of said reception means by using said code assigned to said data receiving apparatus and stored in said storage means as a base.
Claim 27
Dependent Claim
56 words
A data receiving apparatus according to claim 21 wherein a determination is made as to whether or not said code assigned to said data receiving apparatus satisfies a predetermined conditions, predetermined processing being carried out using said code assigned to said data receiving apparatus until said code assigned to data receiving apparatus satisfies said predetermined condition.
Claim 28
Dependent Claim
109 words
A data receiving apparatus according to claim 22 wherein: said predetermined condition is determined to be satisfied by said code assigned to said data receiving apparatus if the number of times said predetermined processing is carried out using said code assigned to said data receiving apparatus is equal to a predetermined value included in data received from other equipment; and said predetermined processing is carried out using said code assigned to said data receiving apparatus by applying a predetermined function to said code assigned to said data receiving apparatus while incrementing the number of times said predetermined function is applied to said code assigned to said data receiving apparatus.
Claim 29
Dependent Claim
16 words
A data receiving apparatus according to claim 23 wherein said predetermined function is a hash function.
Claim 30
Dependent Claim
71 words
A data receiving apparatus according to claim 22 wherein: said predetermined condition is determined to be satisfied by said code assigned to said data receiving apparatus if a result of the decryption of data received from said other equipment is correct; and said predetermined processing is carried out using said code assigned to said data receiving apparatus by applying a predetermined function to said code assigned to said data receiving apparatus.
Claim 31
Dependent Claim
16 words
A data receiving apparatus according to claim 25 wherein said predetermined function is a hash function.
Claim 32
Dependent Claim
33 words
A data receiving apparatus according to claim 21 wherein said decryption includes at least the application of a predetermined function and a random number is used in said application of said predetermined function.
Claim 33
Dependent Claim
16 words
A data receiving apparatus according to claim 27 wherein said predetermined function is a hash function.
Claim 34
Dependent Claim
62 words
An encrypted data decrypting apparatus for carrying out decryption of encrypted data, said apparatus comprising: a random number generator for generating a random number; decrypting means for decrypting input data using said random number generated by said random number generator to generate decrypted data; and processing means for resetting said random number generator when the decrypted data is in a predetermined condition.
Claim 35
Dependent Claim
62 words
An encrypted data decrypting apparatus for carrying out decryption of encrypted data, said apparatus comprising: a random number generator for generating a random number; decrypting means for decrypting input data using said random number generated by said random number generator to generate decrypted data; and processing means for resetting said random number generator when the decrypted data is in a predetermined condition.
Claim 36
Dependent Claim
36 words
An encrypted data decrypting apparatus according to claim 29 wherein said processing means compares the decrypted data with a predetermined value and resets said random number generator when the decrypted data is in a predetermined condition.
Claim 37
Dependent Claim
30 words
An encrypted data decrypting apparatus according to claim 29 further comprising second decrypting means for generating said decrypted data by decryption of said encrypted data based on a key code.
Claim 38
Dependent Claim
42 words
The encrypted data decrypting apparatus according to claim 29 , wherein said processing means resets said random number generator by setting the decrypted data as the initial value of said random number generator when the decrypted data is in a predetermined condition.
Claim 39
Dependent Claim
174 words
A data receiving method for decrypting data at a data receiving apparatus received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code assigned to said data receiving apparatus and indicative of an identification of said data receiving apparatus, and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, said method comprising the steps of: reading out said second code assigned to and indicative of an identification of said data receiving apparatus from storage means associated with said data receiving apparatus; receiving said data and information from said other equipment; and decrypting said received data by using said second code assigned to said data receiving apparatus and said information received from said other equipment as a base.
Claim 40
Dependent Claim
174 words
A data receiving method for decrypting data at a data receiving apparatus received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code assigned to said data receiving apparatus and indicative of an identification of said data receiving apparatus, and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, said method comprising the steps of: reading out said second code assigned to and indicative of an identification of said data receiving apparatus from storage means associated with said data receiving apparatus; receiving said data and information from said other equipment; and decrypting said received data by using said second code assigned to said data receiving apparatus and said information received from said other equipment as a base.
Claim 41
Dependent Claim
57 words
A data receiving method according to claim 33 wherein a determination is made as to whether or not said code assigned to said data receiving apparatus satisfies a predetermined condition, predetermined processing being carried out using said code assigned to said data receiving apparatus until said code assigned to said data receiving apparatus satisfies said predetermined condition.
Claim 42
Dependent Claim
111 words
A data receiving method according to claim 34 wherein: said predetermined condition is determined to be satisfied by said code assigned to said data receiving apparatus if the number of times said predetermined processing is carried out on said said code assigned to said data receiving apparatus is equal to a predetermined value included in data received from said other equipment; and said predetermined processing is carried out using said code assigned to said data receiving apparatus by applying a predetermined function to said code assigned to said data receiving apparatus while incrementing the number of times said predetermined function is applied to said code assigned to said data receiving apparatus.
Claim 43
Dependent Claim
16 words
A data receiving method according to claim 35 wherein said predetermined function is a hash function.
Claim 44
Dependent Claim
71 words
A data receiving method according to claim 34 wherein: said predetermined condition is determined to be satisfied by said code assigned to said data receiving apparatus if a result of the decryption of data received from said other equipment is correct; and said predetermined processing is carried out using said code assigned to said data receiving apparatus by applying a predetermined function to said code assigned to said data receiving apparatus.
Claim 45
Dependent Claim
16 words
A data receiving method according to claim 37 wherein said predetermined function is a hash function.
Claim 46
Dependent Claim
30 words
A data receiving method according to claim 33 wherein said decryption is application of a predetermined function and a random number is used in said application of said predetermined function.
Claim 47
Dependent Claim
16 words
A data transmitting method according to claim 39 wherein said predetermined function is a hash function.
Claim 48
Dependent Claim
45 words
An encrypted data decrypting method for carrying out decryption of encrypted data comprising the steps of: generating a random number; decrypting input data using said random number to generate decrypted data; and resetting said random number when the decrypted data is in a predetermined condition.
Claim 49
Dependent Claim
45 words
An encrypted data decrypting method for carrying out decryption of encrypted data comprising the steps of: generating a random number; decrypting input data using said random number to generate decrypted data; and resetting said random number when the decrypted data is in a predetermined condition.
Claim 50
Dependent Claim
38 words
An encrypted data decrypting method according to claim 41 , further comprising the step of: comparing said input value with a predetermined value and resetting said random number generator when the decrypted data is in a predetermined condition.
Claim 51
Dependent Claim
28 words
An encrypted data decrypting method according to claim 41 , further comprising the step of generating said input data by decrypting said encrypted data with a key code.
Claim 52
Dependent Claim
37 words
The encrypted data decrypting method of claim 41 , wherein said random number is reset by setting the decrypted data as the initial value of said random number when the decrypted data is in a predetermined condition.
Claim 53
Dependent Claim
126 words
A recording medium for recording a program prescribing a data transmitting method whereby data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said method comprising the steps of: reading out a first code from a storage means associated with said particular transmission device; receiving a second code assigned to and indicative of an identification of said other equipment from said other equipment; calculating a first information by application of a predetermined sub-method to said first code read out from said storage means and said second code received from said other equipment; encrypting said data using an encryption key shared with said other equipment based upon said first information; and transmitting said encrypted data completing said predetermined processing.
Claim 54
Dependent Claim
126 words
A recording medium for recording a program prescribing a data transmitting method whereby data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said method comprising the steps of: reading out a first code from a storage means associated with said particular transmission device; receiving a second code assigned to and indicative of an identification of said other equipment from said other equipment; calculating a first information by application of a predetermined sub-method to said first code read out from said storage means and said second code received from said other equipment; encrypting said data using an encryption key shared with said other equipment based upon said first information; and transmitting said encrypted data completing said predetermined processing.
Claim 55
Dependent Claim
33 words
A recording medium for recording a program prescribing a data transmitting method according to claim 45 wherein, in accordance with said predetermined sub-method, a predetermined function is applied a predetermined number of times.
Claim 56
Dependent Claim
169 words
A recording medium for recording a program prescribing a data receiving method for decrypting data received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code assigned to and indicative of an identification of said data receiving apparatus and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, wherein said method comprises the steps of: reading out said second code assigned to and indicative of an identification of said data receiving apparatus from a storage means; receiving said data and information from said other equipment; and decrypting said received data by using said second code assigned to said data receiving apparatus and said information received from said other equipment as a base.
Claim 57
Dependent Claim
169 words
A recording medium for recording a program prescribing a data receiving method for decrypting data received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code assigned to and indicative of an identification of said data receiving apparatus and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, wherein said method comprises the steps of: reading out said second code assigned to and indicative of an identification of said data receiving apparatus from a storage means; receiving said data and information from said other equipment; and decrypting said received data by using said second code assigned to said data receiving apparatus and said information received from said other equipment as a base.
Claim 58
Dependent Claim
65 words
A recording medium for recording a program prescribing a data receiving method according to claim 47 wherein a determination is made as to whether or not said code assigned to said data receiving apparatus satisfies a predetermined condition, predetermined processing being carried out using said code assigned to said data receiving apparatus until said code assigned to said data receiving apparatus satisfies said predetermined condition.
Claim 59
Dependent Claim
128 words
A data transmitting apparatus wherein data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said data transmitting apparatus comprising: a storage memory for storing a first code; a receiver for receiving a second code assigned to and indicative of an identification of said other equipment from said other equipment; a first calculator for calculating a first information by application of a predetermined method to said first code output from said storage memory and said second code received from said other equipment output from said receiver; an information processor for encrypting said data using an encryption key shared with said other equipment based upon the first information; and a transmitter for transmitting said encrypted data output from said information processor.
Claim 60
Dependent Claim
128 words
A data transmitting apparatus wherein data is transmitted after predetermined processing based upon a code assigned to other equipment has been carried out, said data transmitting apparatus comprising: a storage memory for storing a first code; a receiver for receiving a second code assigned to and indicative of an identification of said other equipment from said other equipment; a first calculator for calculating a first information by application of a predetermined method to said first code output from said storage memory and said second code received from said other equipment output from said receiver; an information processor for encrypting said data using an encryption key shared with said other equipment based upon the first information; and a transmitter for transmitting said encrypted data output from said information processor.
Claim 61
Dependent Claim
25 words
The data transmitting apparatus according to claim 49 wherein, in accordance with said predetermined method, a predetermined function is applied a predetermined number of times.
Claim 62
Dependent Claim
22 words
The data transmitting apparatus according to claim 50 wherein said predetermined function is modified in accordance with said predetermined number of times.
Claim 63
Dependent Claim
16 words
The data transmitting apparatus according to claim 51 wherein said predetermined function is a hash function.
Claim 64
Dependent Claim
32 words
The data transmitting apparatus according to claim 49 wherein, in accordance with said predetermined method, a predetermined function is applied and a random number is used in application of said predetermined function.
Claim 65
Dependent Claim
16 words
The data transmitting apparatus according to claim 53 wherein said predetermined function is a hash function.
Claim 66
Dependent Claim
58 words
An encryption apparatus for carrying out encryption, said apparatus comprising: a random number generator for generating a random number; an encrypter for encrypting input data using said random number output from said random number generator, and for generating encrypted data; and a processor for resetting said random number generator when said encrypted data is in a predetermined condition.
Claim 67
Dependent Claim
58 words
An encryption apparatus for carrying out encryption, said apparatus comprising: a random number generator for generating a random number; an encrypter for encrypting input data using said random number output from said random number generator, and for generating encrypted data; and a processor for resetting said random number generator when said encrypted data is in a predetermined condition.
Claim 68
Dependent Claim
42 words
The encryption apparatus according to claim 55 wherein said processor compares the encrypted data output by said encrypter with a predetermined value and resets said random number generator when the encrypted data output from said encrypter is equal to said predetermined value.
Claim 69
Dependent Claim
32 words
The encryption apparatus according to claim 55 further comprising a second encrypter for generating final encrypted data by encryption of said encrypted data output from said encrypter based on a key code.
Claim 70
Dependent Claim
43 words
The encryption apparatus according to claim 55 , wherein said processor resets said random number generator by setting the encrypted data as the initial value of said random number generator when the encrypted data output from said encrypter is in a predetermined condition.
Claim 71
Dependent Claim
161 words
A data receiving apparatus for decrypting data received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code assigned to and indicative of an identification of said data receiving apparatus and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, said apparatus comprising: a storage memory associated with said data receiving apparatus for storing said code assigned to said data receiving apparatus; a receiver for receiving said data and first information from said other equipment; and a decrypter for decrypting an output of said receptor by using said code assigned to said data receiving apparatus and stored in said storage memory as a base.
Claim 72
Dependent Claim
161 words
A data receiving apparatus for decrypting data received from other equipment in accordance with a key shared with said other equipment, said key shared with said other equipment being generated in accordance with at least a second code assigned to and indicative of an identification of said data receiving apparatus and first information received from said other equipment, said first information received from said other equipment being calculated by application of a predetermined method to a first code assigned to said other equipment and said second code received by said other equipment from said data receiving apparatus, said apparatus comprising: a storage memory associated with said data receiving apparatus for storing said code assigned to said data receiving apparatus; a receiver for receiving said data and first information from said other equipment; and a decrypter for decrypting an output of said receptor by using said code assigned to said data receiving apparatus and stored in said storage memory as a base.
Claim 73
Dependent Claim
56 words
The data receiving apparatus according to claim 59 wherein a determination is made as to whether said code assigned to said data receiving apparatus satisfies a predetermined condition, and predetermined processing being carried out using said code assigned to said data receiving apparatus until said code assigned to said data receiving apparatus satisfies said predetermined condition.
Claim 74
Dependent Claim
109 words
The data receiving apparatus according to claim 60 wherein: said predetermined condition is determined to be satisfied by said code assigned to said data receiving apparatus if the number of times said predetermined processing is carried out using said code assigned to said data receiving apparatus is equal to a predetermined value included in data received from other equipment; and said predetermined processing is carried out using said code assigned to said data receiving apparatus by applying a predetermined function to said code assigned to said data receiving apparatus while incrementing the number of times said predetermined function is applied to said code assigned to said data receiving apparatus.
Claim 75
Dependent Claim
16 words
The data receiving apparatus according to claim 61 wherein said predetermined function is a hash function.
Claim 76
Dependent Claim
72 words
The data receiving apparatus according to claim 60 wherein: said predetermined condition is determined to be satisfied by said key code assigned to said data receiving apparatus if a result of the decryption of data received from said other equipment is correct; and said predetermined processing is carried out using said code assigned to said data receiving apparatus by applying a predetermined function to said code assigned to said data receiving apparatus.
Claim 77
Dependent Claim
16 words
The data receiving apparatus according to claim 63 wherein said predetermined function is a hash function.
Claim 78
Dependent Claim
33 words
A data receiving apparatus according to claim 59 wherein said decryption includes at least the application of a predetermined function, and a random number is used in said application of said predetermined function.
Claim 79
Dependent Claim
16 words
A data transmitting apparatus according to claim 65 wherein said predetermined function is a hash function.
Claim 80
Dependent Claim
62 words
An encrypted data decrypting apparatus for carrying out description of encrypted data, said apparatus comprising: a random number generator for generating a random number; a decrypter for decrypting input data using said random number generated by said random number generator to generate; decrypted data; and a processor for resetting said random number generator when the decrypted data is in a predetermined condition.
Claim 81
Dependent Claim
62 words
An encrypted data decrypting apparatus for carrying out description of encrypted data, said apparatus comprising: a random number generator for generating a random number; a decrypter for decrypting input data using said random number generated by said random number generator to generate; decrypted data; and a processor for resetting said random number generator when the decrypted data is in a predetermined condition.
Claim 82
Dependent Claim
35 words
The encrypted data decrypting apparatus according to claim 67 wherein said processor compares the decrypted data with a predetermined value and resets said random number generator when the decrypted data is in a predetermined condition.
Claim 83
Dependent Claim
30 words
The encrypted data decrypting apparatus according to claim 67 further comprising a second decrypter for generating said decrypted data by decryption of said encrypted data based on a key code.
Claim 84
Dependent Claim
41 words
The encrypted data decrypting apparatus according to claim 67 , wherein said processor resets said random number generator by setting the decrypted data as the initial value of said random number generator when the decrypted data is in a predetermined condition.
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