Michael A. Epstein

Secure proximity verification of a node on a network

Detecting And Reacting To Protected Content Material In A Display Or Video Drive Unit

Access authorization across processing devices

Selective Video Blanking

Protecting content from illicit reproduction by proof of existence of a complete data set via self-referencing sections

Protecting content from illicit reproduction by proof of existence of a complete data set via self-referencing sections

Search and storage of media fingerprints

Key distribution via a memory device

Verifying a node on a network

Reordered search of media fingerprints

Copy protection via redundant watermark encoding

Registering copy protected material in a check-out, check-in system

Method and apparatus for decorrelating a random number generator using a pseudo-random sequence

Limiting distribution of copy-protected material to geographic regions

Vouching an authorized copy

Using real random number generator as proof of time

Secure proximity verification of a node on a network

Key exchange via a portable remote control device

Creating expiring copies in a check-out/check-in system

Protecting content from illicit reproduction by proof of existence of a complete data set using security identifiers

Methods of attack on a content screening algorithm based on adulteration of marked content

Method and apparatus for use of a time-dependent watermark for the purpose of copy protection

Administration and utilization of private keys in a networked environment

Protecting content from illicit reproduction by proof of existence of a complete data set via a linked list