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:
Sep. 13, 1988
Filed:
Sep. 02, 1986
Applicant:
Inventors:
Masuo Tamada, Yokohama, JP;
Hitoshi Kokuryo, Sagamihara, JP;
Shinsuke Tamura, Yokohama, JP;
Hiroshi Ozaki, Yokohama, JP;
Assignee:
Kabushiki Kaishia Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ; G06F / ; G06K / ;
U.S. Cl.
CPC ...
380 24 ; 380 23 ; 364900 ; 235380 ;
Abstract
A data processing terminal device is on-line connected to a host computer and records on journal paper journal data obtained as a result of communication with the host computer. Data is encrypted, and encrypted data is exchanged between the terminal device and the host computer. The encrypted journal data received by the terminal is decrypted and printed on a journal paper, then modified and stored in a PROM. By comparing the journal data with the modified data, journal data alteration can be easily detected.