Patent ID: 9154494
Filing Date: 2015-10-06
Classification: H04L

Abstract:
1. A method of generating a first and a second private key and establishing a first and a second self-signed implicit certificate that can be operated on to obtain a first and a second corresponding public key, said method being performed by a computing device in a cryptographic system based on an underlying group of order n, said computing device having a cryptographic unit, said method comprising: said computing device obtaining a long-term private key and a corresponding public-key reconstruction value; said computing device obtaining a first and a second data; said computing device operating on said public-key reconstruction value and said first data to obtain said first self-signed implicit certificate; said computing device operating on said public-key reconstruction value and said second data to obtain said second self-signed implicit certificate; said computing device operating on said long-term private key and said first self-signed implicit certificate to obtain said first private key; and said computing device operating on said long-term private key and said second self-signed implicit certificate to obtain said second private key.