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:
Apr. 06, 2010
Filed:
Dec. 09, 2005
Takahiro Hiramatsu, Tokyo, JP;
Hironobu Abe, Tokyo, JP;
Koichi Yamada, Tokyo, JP;
Junichi Yokosato, Tokyo, JP;
Takahiro Hiramatsu, Tokyo, JP;
Hironobu Abe, Tokyo, JP;
Koichi Yamada, Tokyo, JP;
Junichi Yokosato, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An RTP packet generating unitpacketizes data into packets, and adds identification information to the header of each of the packets, the identification information identifying each of the packets. An RTP packet encrypting unitdivides data included in each of the generated packets into blocks, and encrypts the data included in each of the packets on a block-by-block basis using an encryption key which an encryption key sharing unitshares with a receiving client in such a manner that, when encrypting a first block of the data, the packet encrypting unit encrypts it using the identification information for identifying each of the packets, which is contained, as an initial vector, in the header of each of the packets, and, when encrypting each subsequent block of the data, encrypts it according to an encryption method which uses an immediately-previously-encrypted block.