Method of caching digital certificate revocation lists
January 8, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFinancial transaction system Transaction approval system Coupon validation network with storage of customer coupon data for credit on future purchases Credit/calling card pay telephone method and system employing telephone unit local card-checking and other intelligence cooperative with local personal host computer Fraud prevention system and process for cellular mobile telephone networks System for updating local views from a global database using time stamps to determine when a change has occurred Method and system for proactive password validation Method and apparatus for transaction card verification Method and apparatus for settlement of accounts by IC cards Distributed on-line money access card transaction processing system InventorApplicationNo. 584261 filed on 01/08/1996US Classes:707/10, Distributed or remote access707/2Access augmentation or optimizingExaminersPrimary: Choules, Jack M.Attorney, Agent or FirmInternational ClassG06F 017/30AbstractA method of updating a locally cached revocation list of digital certificates in a client computer with a current data base of revoked certificates stored in a host computer. Upon receipt of a digital certificate submitted to the client computer for verification, the client computer checks the submitted digital certificate against the locally cached revocation list. If the submitted digital certificate is not on the locally cached revocation list, the client computer confirms the validity of the submitted digital certificate and the transaction is consummated. If however, the submitted digital certificate is on the revocation list, the client computer establishes a communication link with the host computer and determines if the submitted digital certificate is in the data base of revoked certificates on the host computer. Without breaking the communication link, the client may request that an updated revocation list to be downloaded.Other References
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