Patent ID: 8069347
Filing Date: 2011-11-29
Classification: H04L

Abstract:
1. A method for recertifying a correspondent in a computer implemented data communication system through the use of a certifying authority, said certifying authority including a cryptographic unit, said method comprising the steps of: a) said certifying authority generating a first random number having a value using said cryptographic unit; b) said certifying authority generating implicit certificate components using said cryptographic unit, said implicit certificate components including a first component generated using said first random number, and a second component generated using said first component and a private key of said certifying authority; c) said certifying authority publishing a public key of said certifying authority; and d) said certifying authority making available said implicit certificate components to enable said correspondent to generate a new private key using said second component and to enable the construction of a new public key using said first component and said public key of said certifying authority; wherein said certifying authority recertifies said correspondent's certificate by changing said value of said first random number using said cryptographic unit.