A certification authority (CA, 120) generates decryption key data (K′Fj) for each set (F) in the complement cover (804) for a plurality of digital certificates. The CA encrypts all or a portion of the validity proof data (cj(i)) for each digital certificate (140.i) for each time period j for which...http://www.google.fr/patents/US7315941?utm_source=gb-gplus-shareBrevet US7315941 - Multi-certificate revocation using encrypted proof data for proving certificate's validity or invalidity
Multi-certificate revocation using encrypted proof data for proving ...
