Method and apparatus for the encryption of data

Details Method and apparatus for the encryption of data Method and apparatus for the encryption of data

2002-10-09

2008-09-30

Moazzami, Nasser (Department: 2136)

Cryptography

Video cryptography

Copy protection or prevention

C380S044000, C369S103000, C369S109010

Reexamination Certificate

active

07430294

ABSTRACT:
There is disclosed a method and apparatus for coding data, for the purpose of preventing unauthorised readout of information. In the method, user information is converted into digital data (UD), and the digital data is recorded in a first data set (CD) and a second data set (HD), where the first data set (CD) is recorded in a first optical storage medium of a data carrier, and the second data set (HD), is recorded in a second, holographic storage medium of the data carrier. According to the method, the digital data (UD) is divided between the first and second data sets (CD,HD) in a manner so that a part of the user information is contained only in the first data set (CD), and another part of the user information is contained only in the second data set (HD), and the relative proportion of the user information in the data sets is selected so that the information contained in any one of the data sets is insufficient by itself to restore the complete user information (UD) contained in both data sets.

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