Method and apparatus to provide secure mobile file system

Details Method and apparatus to provide secure mobile file system Method and apparatus to provide secure mobile file system

2004-06-30

2008-12-02

Zand, Kambiz (Department: 2134)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C709S241000

Reexamination Certificate

active

07461259

ABSTRACT:
In an exemplary embodiment of this invention there is disclosed a mobile wireless terminal (50) that includes a transceiver (52) for coupling the mobile wireless terminal to a wireless network operator (60), a controller (54) and a memory (56). The memory may be assumed to store a file system program (56A) executable by the controller, and to be operable to store a file having a file data portion (14) for containing file data and a data structure, such as a file header (10), having fields for containing values. A plurality of the fields contain a value of a public cryptographic key (24) associated with a file creator, a seed value (26), an encrypted seed value (28) obtained by encrypting the seed value with a private cryptographic key of the file creator, and a file integrity value (30) 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.

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“A Cryptographic File Systems for Unix”, Matt Blaze, 1993, 8 pages.

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