Patent EP0830029A2 successfully refreshed from Google Patents.
Patent EP0254565A2 successfully refreshed from Google Patents.
EP0254565A2
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EP
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Methods of and apparatus for forming identification data
Assignee: Meiji Dairies Corp
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Filing: 1987-07-23
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Granted: —
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Expires: 2007-07-23
Abstract
Abstract Identification data (ID) is formed in such a way as to demonstrate that the user is authorized to utilize a data communication network. Data (RD) of a predetermined number of bits read out on the basis of key data (KD) from data of a large number of bits previously stored (35) at the peripheral side of a terminal machine (30) are used as new key data (KD) and data (RD) each composed of a predetermined number of bits are repeatedly read from the stored data composed of a large number of bits to form identification data (ID) on the basis of said key data (KD). In such manner, there are formed identification data (ID) unequivocally determined in accordance with the key data (KD) and having high security or confidentiality.
Inventors
- 👤 Junichi Ohta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 12:29
CPC Classifications
G; G06; G06F; G06F21/00; G06F21/30; G06F21/31; H; H04; H04L; H04L9/00; H04L9/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
135 words
A method of forming identification data (ID), the method being characterized by: reading out data (RD) of a prescribed number of bits from random number data on the basis of key data (KD), said random number data being formed of a large number of bits and previously stored in a memory (35); forming new key data (KD) at least a part of which is formed by said data (RD) of a prescribed number of bits read out from the random number data; reading out data (RD) of a prescribed number of bits from said random number data on the basis of said new key data (KD), the read-out operation being repeatedly performed; and forming identification data (ID) from said data (RD) of the prescribed number of bits repeatedly read out from said random number data.
Claim 2
Independent Claim
135 words
A method of forming identification data (ID), the method being characterized by: reading out data (RD) of a prescribed number of bits from random number data on the basis of key data (KD), said random number data being formed of a large number of bits and previously stored in a memory (35); forming new key data (KD) at least a part of which is formed by said data (RD) of a prescribed number of bits read out from the random number data; reading out data (RD) of a prescribed number of bits from said random number data on the basis of said new key data (KD), the read-out operation being repeatedly performed; and forming identification data (ID) from said data (RD) of the prescribed number of bits repeatedly read out from said random number data.
Claim 3
Dependent Claim
39 words
A method according to claim 1 further comprising subjecting said key data (KD) to irreversible function processing (Fa) to form address data (AD) for reading out said data (RD) of the prescribed number of bits from said memory (35).
Claim 4
Dependent Claim
38 words
A method according to claim 1 or claim 2 further comprising subjecting said data (RD) of a predetermined number of bits read out from said memory (35) to irreversible function processing (Fb) to form new key data (KD).
Claim 5
Dependent Claim
61 words
A method according to claim 1 further comprising sending said key data (KD) from a host machine (10) to a terminal machine (30), forming identification data (ID) at said terminal machine (30) from said random number data on the basis of said key data (KD), and retransmitting said identification data (ID) from said terminal machine (30) to said host machine (10).
Claim 6
Dependent Claim
71 words
A method according to claim 1 further comprising sending said key data (KD) from a host machine (10) to a terminal machine (30), forming identification data (ID) at said terminal machine (30) from said random number data on the basis of said key data (KD), retransmitting said identification data (ID) to said host machine (10), and incorporating said identification data (ID) at said host machine (10) into data which are transmitted.
Claim 7
Dependent Claim
81 words
A method according to claim 4 or claim 5 comprising sending the data concerning the number of times of repetition of reading out said data (RD) of a prescribed number of bits from said random number data from said host machine (10) to said terminal machine (30) and repeatedly reading out at said terminal machine (30) said data (RD) of a prescribed number of bits from said random number data stored in said memory (35) said number of times of repetition.
Claim 8
Independent Claim
121 words
An apparatus for forming identification data, the apparatus being characterized by: a memory (35) in which random number data formed of a large number of bits are previously stored; address forming means (43) for forming addresses for reading out data (RD) of a prescribed number of bits from said memory (35) on the basis of key data (KD); and data read-out means (44) for transmitting said data (RD) of a prescribed number of bits read out from said memory (35) to said address forming means (43) as at least a part of new key data (KD); the identification data (ID) being formed from said data (RD) each formed of a prescribed number of bits read out from said random number data.
Claim 9
Independent Claim
121 words
An apparatus for forming identification data, the apparatus being characterized by: a memory (35) in which random number data formed of a large number of bits are previously stored; address forming means (43) for forming addresses for reading out data (RD) of a prescribed number of bits from said memory (35) on the basis of key data (KD); and data read-out means (44) for transmitting said data (RD) of a prescribed number of bits read out from said memory (35) to said address forming means (43) as at least a part of new key data (KD); the identification data (ID) being formed from said data (RD) each formed of a prescribed number of bits read out from said random number data.
Claim 10
Dependent Claim
27 words
Apparatus according to claim 7 wherein said address forming means (43) forms the address data (AD) by subjecting said key data (KD) to irreversible function processing (42).
Claim 11
Dependent Claim
41 words
Apparatus according to claim 7 or claim 8 wherein said data read-out means (44) forms new key data (KD) by subjecting said data (RD) of a prescribed number of bits read out from said memory (35) to irreversible function processing (45).
References Cited (Backward Citations)
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