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. 23, 2002
Filed:
Feb. 26, 1998
Takaaki Sasaki, Tokyo, JP;
Yusuke Yamanaka, Tokyo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A file access system includes a file opening unit which opens a given file within an external storage device when a file opening request is issued by an application program. A determining unit determines whether a given file within the storage device has encrypted data when a reading request is issued by the application program. When the given file is determined as having the encrypted data, a reading unit receives a fixed length of the encrypted data from the given file and generates a block of decrypted data of the same size as the fixed length by performing a decryption wherein a position of the fixed length of the decrypted data is determined by a position indicated by the reading request.