Patent ID: 8892890
Filing Date: 2014-11-18
Classification: G06F,H04L

Abstract:
1. A method of symmetric key agreement between a first communication device and a second communication device in a data communication system, each of said first communication device and said second communication device having a master key K, said method comprising: said first communication device generating a first value X and providing said first value X to said second communication device; said second communication device generating a second value Y and computing a shared key k by operating a keyed cryptographic function on a combination of said first value X and said second value Y, said second communication device using said master key K as an input to said keyed cryptographic function; said second communication device providing said second value Y to said first communication device; and said first communication device computing said shared key k by operating said keyed cryptographic function on said combination of said first value X and said second value Y, said first communication device using said master key K as an input to said keyed cryptographic function.