Patent ID: 8918648
Filing Date: 2014-12-23
Classification: H04L

Abstract:
1. A method for secure communications, the method comprising: a cryptographic unit of a first correspondent performing a key agreement protocol using information derived from a private key of a second correspondent in a communication system to establish a shared key with said second correspondent, said first correspondent generating an ephemeral private key x, and an ephemeral public key X corresponding to said ephemeral private key x during said key agreement protocol; said cryptographic unit of said first correspondent generating a digital signature for a message in the data communication system, said generation of said digital signature comprising: said cryptographic unit using said ephemeral public key X of said first correspondent to generate a first signature component; and said cryptographic unit using said message, and said first signature component to generate a second signature component; said first correspondent forwarding said second signature component to said second correspondent.