Protection of digital content using block cipher crytography

Details Protection of digital content using block cipher crytography Protection of digital content using block cipher crytography

2006-05-30

2006-05-30

Zand, Kambiz (Department: 2132)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C380S028000, C380S037000, C380S268000

Reexamination Certificate

active

07055039

ABSTRACT:
Protection of digital content using a specific application of block cipher cryptography is described. The digital content is encrypted using an encryption key and a calculated initialization vector. The digital content includes a plurality of strides of data and each stride includes a string of data to be encrypted and a block of data to be encrypted. The calculated initialization vector to be used to encrypt the block of data is derived from the string of data in the stride to be encrypted. Furthermore, the initialization vector is calculated by performing an exclusive disjunction function on a seed value and the string of data for each stride.

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Schneier, Bruce, “Applied Cryptography-Second Edition: protocols, algorithms, and source code in C”, 1996, pp. 189-211, John Wiley & Sons, Inc., published in the US and Canada.

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