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. 30, 2002
Filed:
Oct. 05, 1998
Takehisa Kato, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
This invention discloses an information sending system for sending encrypted information which can be decrypted in units of parts of information. This information sending system includes information segmentation means for segmenting information into a plurality of blocks, first encryption means for encrypting more than one blocks of the plurality of blocks using a first key, second encryption means for encrypting more than one blocks of the blocks other than those encrypted by the first encryption means using a second key, and information sending means for sending outgoing information including the blocks encrypted by the first encryption means and those encrypted by the second encryption means.