Patent ID: 7995760
Filing Date: 2011-08-09
Classification: H04L,H04W

Abstract:
1. A system for checking that earlier derived encryption keys, a first encryption key in a first device and a second encryption key in a second device, are the same, comprising: a first device and a second device; the first device comprising: a first control block and a first communication block; the second device comprising: a second control block and a second communication block; wherein said first communication block and said second communication block are configured to establish a connection between said first and second devices; wherein said first control block is configured to: generate a random string, calculate a first check string based at least partly on said random string and said first encryption key, and wherein said second control block is configured to: receive said random string and said first check string, calculate a second check string based at least partly on said random string and said second encryption key, and compare the correspondence of said first and second check strings to verify that said first encryption key and said second encryption key are the same, and indicate the result of the comparison.