Patent ID: 8458477
Filing Date: 2013-06-04
Classification: H04L

Abstract:
1. A method comprising: comparing, at a trusted third party, a first hashed value of at least a first decryption key, the first decryption key received from a sender, to a second hashed value of at least a second decryption key that has been received as a signed value from a receiver, the receiver having signed a hashed value of an encrypted message to provide the signed hashed value of the encrypted message, and to serve as an indication that the encrypted message has been received by the receiver, and the sender having displayed proof of encrypted message receipt by displaying information confirming receipt of the signed hashed value of an encrypted message; and sending the first decryption key to the receiver and sending the signed value from the trusted third party to the sender as an indication that the first description key has been received by the receiver, upon determining that the first hashed value matches the second hashed value to verify that the first decryption key is the same as the second decryption key, the receiver displaying proof of decryption key receipt by displaying information confirming receipt of the signed version.