The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1993
Filed:
Oct. 16, 1991
Christopher J Holloway, Woking, GB;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The invention supplements the use of a conventional authentication token such as a MAC or DSG, to provide very strong evidence of the origin of an electronic message. A new type of authentication token, known as the 'Non-Repudiation Vector' (NRV) is attached to each message sent across a data network. The NRV cryptographically links each message sent or received by a particular data processor on the network to previous and subsequent messages handled by that data processor, to create a chain of cryptographically linked messages. The burden of proof for the repudiation of a message is transferred to the sender of a message, who must demonstrate how the sending data processor could have moved through the time period during which the disputed message was sent, without generating the NRV corresponding to the disputed message.