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:
Jan. 05, 1999
Filed:
Oct. 02, 1996
Kiyoshi Nishino, Yamato, JP;
Takashi Oshiyama, Fujisawa, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An IC card 30, which is employed to permit the exchange of secret information while ensuring that security is maintained, includes: a ROM 38 in which an ID is held; a clock 42; a RAM 40 in which a password is stored; a RAM 36 in which a ciphering program is stored; and a CPU 34 that executes a process. The ciphering program is loaded, the stored ID, password and the time t measured by the clock 42 are read and encoded in accordance with the ciphering program, and the results are outputted to a computer system 10. The computer system 10 decodes the output from the IC card 30 and extracts a password, and compares the decoded password with a registered password. When the passwords match, access is enabled; but when they do not match, access is disabled.