Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2011-04-05
2011-04-05
Pyzocha, Michael (Department: 2437)
Cryptography
Video cryptography
Copy protection or prevention
C380S210000, C713S176000
Reexamination Certificate
active
07920702
ABSTRACT:
A system and a method for providing variable security mechanisms for securing digital content, in which a single security mechanism is not used for all content. Instead, at least one characteristic or feature of the security mechanism is varied between units, instances or categories of content. Therefore, even if unauthorized access is gained to a single unit of content, the overall integrity and security of the system for content distribution is not compromised. Preferably, security is provided though a general mechanism, which is then varied in order to provide variable, dissimilar security schemes for different types of content. By “type of content”, it is meant any of a single unit of content, a single instance of content or a single category of content. For example, for a category of content, the content may be characterized according to the identity of the content itself, such as the title of a movie for example, and/or according to the owner of a particular copy of the content. Thus, different security schemes may optionally and preferably be generated from a particular root structure. Related apparatus and methods are also provided.
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Belenky Yaacov
Benedek Gyora
Hibshoosh Eliphaz
Shen-Orr Chaim
Shkedy Zvi
Husch & Blackwell LLP
NDS Limited
Pyzocha Michael
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