Patent ID: 7299357
Filing Date: 2007-11-20
Classification: G06F,G06Q,H04L

Abstract:
1. In a server, a method comprising: receiving from a sending client, a request to encrypt at least a first portion of a message generated by the sending client; generating a split encryption key comprising at least a first key portion and a second key portion; encrypting at least the first portion of the message, using the split encryption key; providing the first key portion to the sending client; storing the encrypted portion of the message and the second key portion on the server; discarding the first key portion from the server; generating, by the server, a first identifier uniquely identifying the message; generating, by the server, one or more recipient-individualized tokens before the first key portion is discarded from the server, each recipient-individualized token comprising a corresponding recipient-individualized identifier and the first key portion; associating, by the server, each of the recipient-individualized tokens with the first identifier; and providing the one or more recipient-individualized tokens to the sending client, the one or more recipient-individualized tokens to be provided by the sending client to corresponding one or more recipients to facilitate access by the one or more recipients to at least the first portion of the message.