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:
Mar. 28, 1995
Filed:
Sep. 01, 1992
Thomas J Mihm, Jr, Mesa, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An environment which includes a communications network, user terminals, and an authentication center provides communication services only to legitimate subscribers. The authentication center receives an equipment ID for each terminal, generates a series of sequence numbers and uses a secret key to encrypt the sequence numbers and the equipment ID with a user ID and an error detection code to form an encrypted block. This block is programmed into an authentication module and sent to the subscriber for installation in the subscriber's terminal. The authentication center sends a public key to network authentication nodes. When the subscriber operates the terminal to gain access to the network, a log-on message, which includes the encrypted block and an unencrypted version of the equipment ID, is sent to an authentication node. The node decrypts the encrypted block and evaluates the IDs and sequence number to determine whether to grant access to services.