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. 25, 2002
Filed:
Aug. 25, 2000
Hiroshi Yoshiura, Kawasaki, JP;
Kazuo Takaragi, Ebina, JP;
Yusuke Hino, Hadano, JP;
Yutaka Otsu, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An information processing system including a data input means ( ) for inputting or receiving data, a data compressing means ( ) for compressing the data, a decompressing means ( ) for decompressing the compressed data and a main storage ( ) is provided with an encrypting means ( ) for encrypting the data and a decrypting means (220) for decrypting the encrypted data. In execution of a compression/encryption step in which the compressing means ( ) and the encrypting means ( ) perform compression and encryption for a part of the data and a decryption/decompression step in which the decompressing means ( ) and the decrypting means ( ) perform decompression and decryption for a part of the compressed and encrypted data, amounts of series of data processed in the compression/encryption and decryption/decompression steps are so set that a memory capacity required for executing the processings does not exceed capacity of the main storage, wherein the compression/encryption and decryption/decompression steps are repeated more than once inclusive.