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:
Jun. 14, 2011
Filed:
Oct. 10, 2007
Shigeyuki Okubo, Yokohama, JP;
Ryota Akiyama, Suginami, JP;
Shigeyuki Okubo, Yokohama, JP;
Ryota Akiyama, Suginami, JP;
Fujitsu Broad Solution & Consulting Inc., Tokyo, JP;
Abstract
A process, a device, and a computer-readable medium storing a program, for encryption. A conversion table having regions each of which stores 2character codes associated with index values is provided, where i is a natural number predetermined for each region, the 2character codes are defined in a predetermined character encoding scheme, and the index values have a minimum necessary bit length for uniquely identifying the 2character codes within each region. First character codes constituting a plaintext are converted into index values by reference to respectively corresponding regions of the conversion table. Then, the index values are encrypted without changing the bit lengths, and the encrypted values are converted into second character codes associated with index values identical to the encrypted values by reference to the respectively corresponding regions of the conversion table, a sequence of the second character codes is outputted as an encrypted text.