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:
Apr. 08, 2008
Filed:
Jan. 24, 2001
Norio Arakawa, Tokyo, JP;
Jun Miyajima, Tokyo, JP;
Norio Arakawa, Tokyo, JP;
Jun Miyajima, Tokyo, JP;
Advantest Corporation, Tokyo, JP;
Abstract
The present invention provides a device authentication unit for authenticating a computer, a measuring device or another device having a serial number or another inherent device number. A software encrypting section receives a serial number and encrypts the received serial number in the public key method with the serial number being a public key. An encrypted data transmission section transmits the encrypted serial number. A received serial number decoding section receives an encrypted serial number and decodes the encrypted serial number using a secret key corresponding to the serial number. Public key decoding by the received serial number decoding section succeeds only if a correct serial number is given. Accurate serial number inherent to the device can be acquired and device authentication can be made.