Data stream header object protection

Details Data stream header object protection Data stream header object protection

H - Electricity

04

L

H04L 12/56 (2006.01) G06F 1/00 (2006.01) G06F 9/06 (2006.01) G06F 12/14 (2006.01) G06F 13/00 (2006.01) G06F 15/16 (2006.01) G06F 17/00 (2006.01) G06F 17/30 (2006.01) G09C 1/00 (2006.01) G11C 27/02 (2006.01) H04L 9/00 (2006.01) H04L 9/32 (2006.01) H04L 12/24 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2441620

A header object for a data file is comprised of sub-objects which specify properties of the data stream and contains information needed to properly verify and interpret the information within the data object. In order to allow the protection of any set of sub.- objects without requiring that the sub-objects follow any specific ordering, a new sub-object is introduced which includes region specifiers identifying regions within sub-objects and verification information for those regions. This new sub-object in the header object allows the modification of non-protected regions and reorganization of sub-objects in a header without invalidating verification information.

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