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:
Aug. 15, 2006
Filed:
Dec. 17, 1999
Koichi Kamijo, Yokohama, JP;
Norishige Morimoto, Tokyo-to, JP;
Akio Koide, Yokohama, JP;
Tohru Sakakura, Yokohama, JP;
Koichi Kamijo, Yokohama, JP;
Norishige Morimoto, Tokyo-to, JP;
Akio Koide, Yokohama, JP;
Tohru Sakakura, Yokohama, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system for authenticating digital data capable of preventing change or disguise of data by improvement or interchange in case of no confidentiality in the data itself so as to maintain the data. When writing digital data from an input device to a memory and transferring the digital data from the memory to a receiving device, device authentication is performed between the input device and the memory and between the memory and the receiving device respectively. At the same time, when writing digital data to the memory, in the case of implementing on the digital data an electronic signature by a one-way hash function and also reading from the memory and transferring the digital data, the implemented electronic signature is decrypted so as to transfer the digital data after ensuring that it has not been changed since it was recorded. Thus, it is possible to prevent change or disguise of data by improvement or interchange in case of no confidentiality in the data itself so as to maintain the data.