Patent EP0186038A2 successfully refreshed from Google Patents.
EP0186038A2
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EP
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Identification system
Assignee: Casio Computer Co Ltd
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Filing: 1985-12-10
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Granted: —
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Expires: 2005-12-10
Abstract
Abstract An identification system (100) wherein validity between a first unit (1) and a second unit (2) is identified when the first unit (1) is electrically communicated with the second unit (2). The first unit (1) includes a generator (12) for generating identification code information, a calculator (13) for calculating, based upon the identification code information, an estimation time required for processing the identification code information in the second unit (2), a time counter (14) for measuring an actual time required for completely processing the identification code information in the second unit (2), and an unit (15; 11) for identifying validity between said first and second units (1; 2) by comparing the actual processing time to the estimation processing time. The second unit (2) includes at least a processor (23) for processing the identification code information sent from the first unit (1).
Inventors
- 👤 Yoshimi Patent Dep. Developement Div. Shigenaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:01
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G07F7/0806; G07F7/0813; G07F7/082
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
136 words
An identification system (100) wherein validity between a first unit (1) and a second unit (2) is identified when the first unit (1) is electrically communicated with the second unit (2), characterized in that said first unit (1) includes: means (12) for generating identification code information; means (13) for calculating, based upon the identification code information, an estimation time required for processing the identification code information in the second unit (2); means (14) for measuring an actual time required for completely processing the identification code information in the second unit (2), and means (15) for identifying validity between said first and second units (1; 2) by comparing the actual processing time to the estimation processing time; and said second unit (2) includes: means (23) for processing the identification code information sent from said first unit (1).
Claim 2
Dependent Claim
136 words
An identification system (100) wherein validity between a first unit (1) and a second unit (2) is identified when the first unit (1) is electrically communicated with the second unit (2), characterized in that said first unit (1) includes: means (12) for generating identification code information; means (13) for calculating, based upon the identification code information, an estimation time required for processing the identification code information in the second unit (2); means (14) for measuring an actual time required for completely processing the identification code information in the second unit (2), and means (15) for identifying validity between said first and second units (1; 2) by comparing the actual processing time to the estimation processing time; and said second unit (2) includes: means (23) for processing the identification code information sent from said first unit (1).
Claim 3
Dependent Claim
40 words
A system (100) as claimed in claim 1, characterized in that when. the actual processing time is substantially equal to the estimation processing time, validity between said first and second units (1; 2) is identified in the identifying means (15).
Claim 4
Dependent Claim
56 words
A system (100) as claimed in claim 1, characterized in that the identification code generating means of said first unit (1) includes: means (120) for generating random number data in relation to the communicated second unit (2), and an encryptor (121) for producing encryption data as the identification code data based upon the random number data.
Claim 5
Dependent Claim
24 words
A system (100) as claimed in claim 3, characterized in that the encryptor is an RSA encryptor (121) utilizing an RSA data encryption algorithm.
Claim 6
Dependent Claim
61 words
A system (100) as claimed in claim 4, characterized by further comprising: a first memory (126) for storing a manufacture public key code (MPUK), and a second memory (127) for storing an issuer public key code (IPUK), whereby the RSA encryptor encrypts the random number data by utilizing said MPUK and IPUK codes in accordance with the RSA data encryption algorithm.
Claim 7
Dependent Claim
30 words
A system (100) as claimed in claim 1, characterized in that said identification code information generating means includes an encryptor for producing encryption data corresponding to the identification code information.
Claim 8
Dependent Claim
63 words
A system (100) as claimed in claim 6, characterized in that the encryptor is an RSA encryptor (121) utilizing an RSA data encryption algorithm and a first memory is provided with the RSA encryptor (121) for' storing a specific encryption key code, whereby said RSA encryptor (121) produces the encryption data by utilizing the specific encryption key code stored in the first memory.
Claim 9
Dependent Claim
34 words
A system (100) as claimed in claim 1, characterized in that the estimation processing time is determined only by an architecture and also a processing algorithm of the identification code information processing means (23).
Claim 10
Dependent Claim
36 words
A system (100) as claimed in claim 1, characterized in that the identification code processing means (23) of said second unit (2) includes a decryptor for decrypting the identification code information sent from the first unit.
Claim 11
Dependent Claim
24 words
A system (100) as claimed in claim 9, characterized in that the decryptor is an RSA decryptor (263) utilizing an RSA data decryption algorithm.
Claim 12
Dependent Claim
66 words
A system (100) as claimed in claim 10, characterized by further comprising: a third memory (259) for storing an issuer private key code (IPRK), and a fourth memory (258) for storing a manufacture private key code (MPRK), whereby the RSA decryptor decrypts the identification code information sent from the first unit by utilizing said IPRK and MPRK codes in accordance with the RSA data decryption algorithm.
Claim 13
Dependent Claim
63 words
A system (100) as claimed in claim 7, characterized in that the decryptor is an RSA decryptor (263) utilizing an RSA data decryption algorism and a second memory is provided with the RSA decryptor (263) for storing a specific decryption key code, whereby said RSA decryptor (263) decrypts the encryption data by utilizing the specific decryption key code stored in the second memory.
Claim 14
Dependent Claim
29 words
A system (100) as claimed in claim 1, characterized in that said first unit is an IC card terminal (1) and said second unit is an IC card (2).
Claim 15
Dependent Claim
33 words
A system (100) as claimed in claim 13, characterized in that the IC card terminal (1) is initialized by receiving a personal identification number (PIN) when electrically communicated with the IC card (2).
References Cited (Backward Citations)
No citation records indexed.
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