Cryptographic apparatus for performing cryptography on a...

Details Cryptographic apparatus for performing cryptography on a... Cryptographic apparatus for performing cryptography on a...

2005-11-29

2005-11-29

Caldwell, Andrew (Department: 2134)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S165000, C380S037000, C711S163000

Reexamination Certificate

active

06971022

ABSTRACT:
A cryptographic apparatus reads, from a portable storage medium, content data and cryptographic information specifying a certain part of the content data on which cryptographic processing is to be performed, specifies the certain part in the read content data based on the read cryptographic information, and performs one of encryption and decryption on the certain part. When, for example, the content data is formed from alternating headers and variable-length data sections, the cryptographic information is a program formed from an instruction sequence. The instruction sequence has the cryptographic apparatus detect a header in the content data, read the length of the variable-length data, and perform cryptographic processing on a part of the content data between a start point and an end point, the start point being a position relative to the header position, and the end point being a value resulting from adding the length to the start point.

REFERENCES:
patent: 5261003 (1993-11-01), Matsui
patent: 5475757 (1995-12-01), Kelly
patent: 5546461 (1996-08-01), Ibaraki et al.
patent: 5548648 (1996-08-01), Yorke-Smith
patent: 5875349 (1999-02-01), Cornaby et al.
patent: 6052780 (2000-04-01), Glover
patent: 6314409 (2001-11-01), Schneck et al.
patent: 6490353 (2002-12-01), Tan
patent: 6550009 (2003-04-01), Uranaka et al.
patent: 10055135 (1998-02-01), None
patent: 11215122 (1999-08-01), None
Sholander et al. “The Effect of Algorithm-Agile Encryption on ATM Quality of Service”, 1997 IEEE.
Dictionary.com. Definition of “match”, May 2005.

Affiliated with

Also associated with

Rating

Cryptographic apparatus for performing cryptography on a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cryptographic apparatus for performing cryptography on a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryptographic apparatus for performing cryptography on a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3502177