EP0216298A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Identification system
Assignee: Casio Computer Co Ltd
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Filing: 1986-09-16
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Granted: —
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Expires: 2006-09-16
Abstract
Abstract Data (PAN, CHN, EPD) peculiar to an IC card (11) and encrypted peculiar data (IA) obtained by encrypting the peculiar data are previously stored in the IC card (11). The encrypted peculiar data (IA) is decrypted in an IC card terminal (12), to obtain decrypted data (D-PAN, D-CHN, D-EPD) and the decrypted data (D-PAN, D-CHN, D-EPD) and peculiar data (PAN, CHN, EPD) stored in the IC card (11) are compared on the side of the IC card (11) and also on the side of the IC card terminal (12), whereby the authenticity of both the IC card (11) and IC card terminal (12) is confirmed.
Inventors
- 👤 Shigeyuki C/O Pat. Dep. D. D. Hamura R&D. Kawana
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/36; G06Q20/367; G06Q20/3674; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4097; G07F7/1016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
231 words
An identification system (100) comprising: IC card means (11); IC card terminal means (12) capable of electrically communicating with the IC card means (11) when the IC card means (11) is loaded thereon; said IC card means (11) including first memory means (28) for storing at least data unique (PAN, EPD, CHN) to said IC card means and encrypted unique data (IA) obtained by encrypting said unique data (PAN, EPD, CHN); said IC card terminal means (12) including decrypting means (36) for decrypting said encrypted unique data (IA) stored in said first memory means (28) to derive decrypted unique data (D-PAN, D-CHN, D-EPD); said IC card means (11) further including first comparing means (29) for comparing said decrypted unique data (D-PAN) sent from said IC card terminal means (12) with said unique data (PAN) stored in said first memory means (28) so as to judge whether said unique data (PAN) is coincident with said decrypted unique data (D-PAN); and said IC card terminal (12) further including second comparing means (41) for comparing said decrypted unique data (D-PAN) with said unique data (PAN) stored in said first memory means (28) and sent from said IC card means (11) so as to judge whether said unique data (PAN) is coincident with said decrypted unique data (D-PAN), thereby confirming identities of both said IC card means (11) and said IC card terminal means (12).
Claim 2
Dependent Claim
231 words
An identification system (100) comprising: IC card means (11); IC card terminal means (12) capable of electrically communicating with the IC card means (11) when the IC card means (11) is loaded thereon; said IC card means (11) including first memory means (28) for storing at least data unique (PAN, EPD, CHN) to said IC card means and encrypted unique data (IA) obtained by encrypting said unique data (PAN, EPD, CHN); said IC card terminal means (12) including decrypting means (36) for decrypting said encrypted unique data (IA) stored in said first memory means (28) to derive decrypted unique data (D-PAN, D-CHN, D-EPD); said IC card means (11) further including first comparing means (29) for comparing said decrypted unique data (D-PAN) sent from said IC card terminal means (12) with said unique data (PAN) stored in said first memory means (28) so as to judge whether said unique data (PAN) is coincident with said decrypted unique data (D-PAN); and said IC card terminal (12) further including second comparing means (41) for comparing said decrypted unique data (D-PAN) with said unique data (PAN) stored in said first memory means (28) and sent from said IC card means (11) so as to judge whether said unique data (PAN) is coincident with said decrypted unique data (D-PAN), thereby confirming identities of both said IC card means (11) and said IC card terminal means (12).
Claim 3
Dependent Claim
49 words
An identification system (100) as claimed in claim 1, characterized in that, when the result of comparison by at least one of said first and second comparing means (29, 41) is non-coincident, subsequent communication between said IC card means (11) and said IC card terminal means (12) is interrupted.
Claim 4
Dependent Claim
69 words
An identification system (100) as claimed in claim 2, characterized in that said IC card terminal means (12) further includes second memory means (37) for storing key information (PRK) for decryption, said decrypting means (36) of said IC card terminal means (12) decrypting said encrypted unique data (IA) stored in said first memory means (28) on the basis of a "RSA" algorithm using said key information for decryption (PRK).
Claim 5
Dependent Claim
139 words
An identification system (100) as claimed in claim 2, characterized in that said unique data and encrypted unique data (IA) stored in said first memory means (28) of said IC card means (11) each are constructed of a plurality of different data information (PAN, EPD, CHN); said IC card means (11) includes first selecting means (27) for selecting at least one of said plurality of unique data (PAN, EPD, CHN); said IC card terminal means (12) includes second selecting means (39) for selecting at least one of a plurality of decrypted data (D-PAN, D-EPD, D-CHN) decrypted by said decrypting means (36); and said first comparing means (29) compares said unique data (PAN, EPD, CHN) with said decrypted data (D-PAN, D-EPD, D-CHN) selected by said first and second selecting means (27, 39) so as to judge coincidence between said data.
Claim 6
Dependent Claim
68 words
An identification system (100) as claimed in claim 4, characterized in that, when the result of comparison by said first comparing means (29) in said IC card means (11) is non-coincident, said second comparing means (41) of said IC card terminal means (12) compares all of the unique data stored in said first memory means (28) with all of the decrypted data decrypted by said decrypting means (36).
Claim 7
Dependent Claim
42 words
An identification system (100) as claimed in claim 5, characterized in that said unique data include data "PAN", "CHN" and "EPD", and said decrypted data is obtained by encrypting said data "PAN", "CHN" and EPD" on the basis of the RSA algorithm.
References Cited (Backward Citations)
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