Patent ID: 8806214
Filing Date: 2014-08-12
Classification: G11B,H04L,H04N

Abstract:
1. A method comprising: receiving, at a trusted third party (TTP), a signed disguised message as a disguised receiver signature from a receiver that has signed a disguised message using a blind signature process to transform the disguised message into the signed disguised message; sending, from the TTP, an undisguised version of the disguised message to the receiver, the undisguised version sent to the TTP by a sender of the undisguised version, and sending, from the TTP, a receiver signature associated with the disguised receiver signature to the sender of the undisguised version, after determining that the receiver signature is valid; prior to sending a decryption key associated with an encrypted message previously sent from the sender to the receiver, performing at least one of verifying by the TTP that the encrypted message has been sent from the sender to the receiver or verifying by the TTP that the receiver has sent a signed version of the encrypted message to the sender; and discarding, by the TTP, all data associated with the receiving and the sending, after the sending is complete.