System and method for performing compression/encryption on...

Details System and method for performing compression/encryption on... System and method for performing compression/encryption on...

2007-11-06

2007-11-06

Cottingham, John (Department: 2167)

Data processing: database and file management or data structures

Database design

Data structure types

Reexamination Certificate

active

10880843

ABSTRACT:
Desired transformations such as compression, encryption and/or encoding are applied to data such that the number of duplicate chunks in the transformed data is increased and the chunks are predominantly of a predetermined size. Additionally, the unique and duplicate chunks of transformed data are identified. A variable-sized window is passed over the set of data to generate a working chunk of transformed data that is of the predetermined size. When the working chunk is a duplicate chunk of data, a next group of untransformed data is selected from the set of data, transformed and then evaluated. When the working chunk is not a duplicate chunk of data, a next group of data is selected by sliding the window over the set of data to generate another working chunk that is evaluated.

REFERENCES:
patent: 6799258 (2004-09-01), Linde
patent: 6895415 (2005-05-01), Rezaul Islam et al.

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