Malleable pseudonym certificate system and method
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United States of America Patent
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Issued Date -
Jun 21, 2007
app pub date -
Sep 20, 2006
filing date -
Sep 21, 2005
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Abstract
The invention provides a malleable pseudonym certificate system and method for a communication network. According to one embodiment of the invention, a user acquires a root proof from a trusted entity, generates one or more pseudonym certificates based on the root proof, and sends anonymous public keys each equipped with one pseudonym certificate to verifiers. Through use of the pseudonym certificate, the verifier believes that the user's anonymous public key is certified by the trusted entity. The pseudonym certificate contains no information by which the verifier can figure out the real identity of the user. With the malleable pseudonym certificate system, the trusted entity needs only certify once for the user's root public key. The user can generate by him or herself mass anonymous public keys where each anonymous public key is equipped with a distinct pseudonym certificate.
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