Patent ID: 8595142
Filing Date: 2013-11-26
Classification: G06F,G06Q,H04L

Abstract:
1. A method for maintaining privacy for transactions performable by a user device comprising a processor having a security module executable by the processor, the method comprising: obtaining, by the user device, first attestation values from an issuer; generating, by the user device, a first set of attestation-signature values based on the first attestation values; sending, by the user device, the first set of attestation-signature values to a privacy certification authority computer; obtaining, by the user device, second attestation values from the privacy certification authority computer based on the first set of attestation-signature values; generating, by the user device, a second set of attestation-signature values by using the second attestation values; and sending, by the user device, the first and second set of attestation-signature values to the verification computer, the verification computer configured to check validity of the first set of attestation-signature values with an issuer public key of the issuer, the validity of the second set of attestation-signature values with an authority public key of the privacy certification authority computer and to verify that the first and second sets of attestation-signature values relate to the user device.