Patent ID: 8429408
Filing Date: 2013-04-23
Classification: H04L

Abstract:
1. A method of establishing a private key k A for use in a public key cryptographic system established between a first correspondent computing device and a second correspondent computing device, each of the first computing device and the second computing device comprising a cryptographic unit to perform cryptographic operations, the method comprising: a processor of the first correspondent computing device: a) establishing a private value x b) computing a corresponding public key X c) encrypting the public key X d) forwarding the encrypted public key X e) receiving from the trusted party encrypted private key reconstruction data and an implicit certificate, based upon the public key X f) applying a decryption key to recover the private key reconstruction data, the decryption key corresponding to a combination of the private value x g) computing the private key k whereby the first correspondent computing device may use the private key k