e718583c_operating_method___Patents_com__Description
[Patent #] US-8,006,086 [Description] 
Revocation of cryptographic digital certificates A computer system (110) provides validity status proofs each of which proves the validity or invalidity of a set (F) of one or more digital certificates (104)....
Patents filed at Aug 23 2011 | Central processing unit with multiple clock zones and operating method | Patents.com