Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2007-06-05
2007-06-05
Revak, Christopher (Department: 2131)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C713S165000, C713S194000, C726S026000, C380S228000
Reexamination Certificate
active
09884618
ABSTRACT:
A method and system for forming a data table in memory on an end user system. The data table forming a library index of storage locations to electronic digital content in memory. The method consists of retrieving an encrypted file from storage. The file has a beginning, an end and a trailer section located just prior to the end. The file is read from the end a predetermined distance to verify if an identifier is present. Reading and decrypting the trailer section from the file read. Determining if there are any updates in the trailer section. In the case there are no updates in the trailer section then decrypting the reference table containing one or more data table location indicators for data items with the first decrypting key. Next, decrypting one or data items with the first decrypting key. Populating the data table with data items at locations specified in the reference table.
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Geisler Douglas R.
Mahlbacher James C.
Spagna Richard L.
Zhao Ting
Abrishamkar Kaveh
Fleit Kain Gibbons Gutman Bongini & Bianco P.L.
Gibbons Jon A.
Gibbs Andre
International Business Machines - Corporation
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