Data processing: financial – business practice – management – or co – Business processing using cryptography – Secure transaction
Reexamination Certificate
2006-06-30
2011-11-08
Fischer, Andrew J. (Department: 3621)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Secure transaction
C705S012000, C705S026100
Reexamination Certificate
active
08055589
ABSTRACT:
A system for enabling verification in traceability of a supply chain while maintaining confidentiality of private suppliers. A group signature is applied to an undisclosed supplier. The undisclosed supplier previously receives registration to the certificate authority device, and performs a group signature based on the certificate issued by the certificate authority device. A disclosed supplier and the undisclosed supplier sign and generate a signature chain when they ship parts. A verifier device receives a signature chain with products shipped from the supplier manager device, divides a signature of the disclosed supplier from a signature chain, and verifies the undisclosed supplier from the group signature. Identification of the undisclosed supplier is performed by a third-party auditor system requested to do so by the verifier device by using a group private key.
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Saito Mika
Watanabe Yuji
Yoshizawa Takeo
Yuriyama Madoka
Dega Murali
Fischer Andrew J.
International Business Machines - Corporation
Stock William J.
Tuchman Ido
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