Patent ID: 8561158
Filing Date: 2013-10-15
Classification: H04L

Abstract:
1. A method of searching and retrieving certificates relating to a message received from a sender, the message comprising a first part and a second part, the first part comprising a header and a message body of the message, and the second part comprising data identifying a sender certificate associated with the message, wherein the method comprises: at a computing device, receiving, at least some data of the first part of the message but not of the second part of the message, wherein the at least some data of the first part of the message contains first certificate identification data that uniquely identifies the sender certificate; performing a search on one or more certificate servers, wherein at least one query is submitted to the one or more certificate servers to request retrieval of certificates satisfying a certificate search request; retrieving at least one certificate satisfying the certificate search request from the one or more certificate servers; and processing each retrieved certificate using the first certificate identification data to determine if any of the retrieved at least one certificate is the sender certificate associated with the message.