Scalable certificate validation and simplified pki management

Abstract From the Canadian patent

Managing a digital certificate includes a landlord providing a digital certificate, a secure hardware device generating a series of n hash values the secure hardware device providing an nth hash value to the landlord wherein other hash values are not readily available to the landlord the , landlord placing the nth hash value in the certificate the landlord , certificate, a tenant obtaining the digitally signed significate the tenant , obtaining the n hash values and the tenant managing the certificate by periodically issuing a previous hash value in the series of n hash in response to the certificate being valid when the previous hash value is issued.