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:
Jul. 26, 2011
Filed:
Jul. 31, 2007
Tsuyoshi Ikushima, Nara, JP;
Satoshi Furusawa, Osaka, JP;
Tomokazu Sada, Osaka, JP;
Masaru Fuse, Osaka, JP;
Tomoaki Ohira, Osaka, JP;
Tsuyoshi Ikushima, Nara, JP;
Satoshi Furusawa, Osaka, JP;
Tomokazu Sada, Osaka, JP;
Masaru Fuse, Osaka, JP;
Tomoaki Ohira, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A data transmitting apparatus has improved security against eavesdropping for secret communication using Y-00 protocol. The multi-level code generation section generates, based on key information, a multi-level code sequence in which a signal level changes so as to be approximately random numbers. The multi-level processing section generates a multi-level signal having a level which corresponds to a combination between information data and the multi-level code sequence. The error signal generation section generates an error signal which changes randomly. The accumulation section accumulates the error signal, and outputs an accumulated error signal. The adding section adds the accumulated error signal to the multi-level signal, and outputs a variable multi-level signal. The modulator section modulates the variable multi-level signal, and outputs a modulated signal.