Patent ID: 9660978
Date: 2017-05-23
CPC Classifications: H04L

Claim:
1. A method of issuing a digital certificate comprising: receiving, at a node in a communication system, a certificate request comprising a first public key of an entity, the first public key being associated with a first cryptosystem; generating a digital certificate comprising unpopulated fields; populating a public key field of the digital certificate with the first public key of the entity; populating an extension of the digital certificate with a second public key of the entity, the second public key being associated with a second cryptosystem; by operation of one or more processors, using a first private key of the certificate authority to generate a first digital signature based on information in the certificate request, the first private key of the certificate authority being associated with the first cryptosystem, the first digital signature generated from the digital certificate comprising the first public key in the public key field and the second public key in the extension; and populating a signature value field of the digital certificate with the first digital signature.