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:
Dec. 02, 2008
Filed:
Jun. 30, 2004
Ram Gopal Lakshmi Narayanan, Hudson, NH (US);
Ram Gopal Lakshmi Narayanan, Hudson, NH (US);
Nokia Corporation, Espoo, FI;
Abstract
In an exemplary embodiment of this invention there is disclosed a mobile wireless terminal () that includes a transceiver () for coupling the mobile wireless terminal to a wireless network operator (), a controller () and a memory (). The memory may be assumed to store a file system program (A) executable by the controller, and to be operable to store a file having a file data portion () for containing file data and a data structure, such as a file header (), having fields for containing values. A plurality of the fields contain a value of a public cryptographic key () associated with a file creator, a seed value (), an encrypted seed value () obtained by encrypting the seed value with a private cryptographic key of the file creator, and a file integrity value () obtained using the encrypted seed value and the file data. By the use of the preferred embodiments a file can be traced-back though a plurality of file handlers to a creator of the file.