Patent ID: 7660989
Filing Date: 2010-02-09
Classification: H04L

Abstract:
1. A method of transmitting a message from a sender to a recipient through a server displaced from the recipient, including the steps: receiving the message by the server from the sender; generating by the server a digital signature of the message; generating by the server a file containing, in HTML format, an identity of the sender and instructions describing how to authenticate the message; concealing the digital signature of the message in the file; attaching the file containing the identity of the sender and instructions describing how to authenticate the message and the concealed digital signature to the message by the server; transmitting from the server to the recipient the message and an attachment; receiving the message and the attachment by the server from the recipient; providing digital signatures of the message and the attachment by the server, and authenticating to the recipient the message and the attachment by the server on the basis of the information received by the recipient from the server and on the basic of the digital signatures provided by the server.