Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Reexamination Certificate
2004-02-14
2009-08-25
Hoffman, Brandon S (Department: 2436)
Cryptography
Communication system using cryptography
Data stream/substitution enciphering
C380S200000
Reexamination Certificate
active
07580520
ABSTRACT:
A method for scaling a progressively encrypted sequence of scalable data is disclosed. The method includes associating data with the progressively encrypted sequence of scalable data that identifies combinable portions of the progressively encrypted sequence of scalable data to combine in order to produce a scaled version of the progressively encrypted sequence of scalable data. The scaled version of the progressively encrypted sequence of scalable data is scaled to possess a desired scalable attribute. Moreover, the scaled version of the progressively encrypted sequence of scalable data is scaled without being decoded. A cryptographic checksum is computed for at least one combinable portion of the progressively encrypted sequence of scalable data and, a cryptographic checksum is associated with the at least one combinable portion of the progressively encrypted sequence of scalable data.
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Search Report—PCT/US2005/004535 filed Feb. 2, 2005.
Apostolopoulos John G.
Wee Susie J.
Hewlett--Packard Development Company, L.P.
Hoffman Brandon S
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