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:
Mar. 07, 2006
Filed:
Dec. 20, 2000
Seigo Kotani, Kawasaki, JP;
Takaoki Sasaki, Tokyo, JP;
Yusuke Yamanaka, Tokyo, JP;
Takayuki Hasebe, Kawasaki, JP;
Ryota Akiyama, Kawasaki, JP;
Seigo Kotani, Kawasaki, JP;
Takaoki Sasaki, Tokyo, JP;
Yusuke Yamanaka, Tokyo, JP;
Takayuki Hasebe, Kawasaki, JP;
Ryota Akiyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A cryptographic communication method is provided in which a cryptographic communication is performed by an easy operation even if both enciphered data and unenciphered data are mixed to be handled. In the transmission side, a communication key is used for enciphering data to be transmitted, and in the reception side the same communication key as in the transmission side is used for decoding received data. In the transmission side, an individual key that is different from the communication key is used for enciphering the data to be transmitted, the enciphered data are decoded by using the individual key first, and then the decoded data are enciphered by using the communication key so that the enciphered file can be transmitted.