Two Schemes of PrivacyCA with Higher Untraceability
- Resource Type
- Conference
- Authors
- Ying, Liu; Chaoling, Li; Yanzhou, Zhou; Lixin, Li
- Source
- 2010 International Forum on Information Technology and Applications Information Technology and Applications (IFITA), 2010 International Forum on. 2:176-179 Jul, 2010
- Subject
- Computing and Processing
Privacy
Public key
Couplings
Protocols
Certification
Computers
Trusted Computing
PrivacyCA
Agents
Partially Blind Signature
- Language
Because the PrivacyCA defined in TCG specification may leak user’s privacy and trace his transactions, two PrivacyCA schemes with higher untraceability are proposed. The agents-based one provides higher untraceability by introducing agents and VK certificates to eliminate the linkage between EK and AIK. By adopting Partially Blind Signature algorithm in the generation of AIK triples, PBS-based one provides absolute untraceability to user’s transactions because the public AIK is blinded while being signed by the PrivacyCA. New schemes keep good compatibility to TCG specification and provide different levels of untraceability to satisfy particular applications.