发明名称 |
MAINTAINING PRIVACY FOR TRANSACTIONS PERFORMABLE BY A USER DEVICE HAVING A SECURITY MODULE |
摘要 |
The present invention discloses a method and system for maintaining privacy for transactions performable by a user device having a security module with a privacy certification authority and a verifier. The system comprises an issuer providing an issuer public key PKI; a user device having a security module for generating a first set of attestation-signature values DAA1; a privacy certification authority computer for providing an authority public key PKPCA and issuing second attestation values AV2; and a verification computer for checking the validity of the first set of attestation-signature values DAA1 with the issuer public key PKI and the validity of a second set of attestation-signature values DAA2 with the authority public key PKPCA, the second set of attestation-signature values DAA2 being derivable by the user device 20 from the second attestation values AV2, wherein it is verifiable that the two sets of attestation-signature values DAA1, DAA2 relate to the user device. |
申请公布号 |
WO2005038634(A3) |
申请公布日期 |
2005.10.27 |
申请号 |
WO2004IB02710 |
申请日期 |
2004.08.20 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION;CAMENISCH, JAN |
发明人 |
CAMENISCH, JAN |
分类号 |
G06F1/00;G06F21/33;G06F21/57;G06F21/60;G06Q20/38;G06Q20/40;H04L9/32 |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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