A contents utilization control apparatus includes an input unit for inputting a) contents with control module that consist of contents and a control module, and b) a license with control module that consists of a license prepared from contents utilization approval information and a control module. The control module in the contents with control module and the control module in the license with control module cooperate with each other to carry out a control relating to the utilization of the contents.

 
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< Analysis resistant cipher method and apparatus

> Hybrid network encrypt/decrypt scheme

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