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Apparatus and method for preventing unauthorized copying of vide

Cryptography – Cryptanalysis
Patent

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Apparatus and method for preventing unauthorized use of...

Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate

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Apparatus and method for processing a high definition video sign

Cryptography – Cryptanalysis
Patent

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Apparatus and method for processing information and...

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Apparatus and method for processing of frequency hopping communi

Cryptography – Communication system using cryptography – Wireless communication
Patent

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Apparatus and method for producing a digitized transaction recor

Cryptography – Cryptanalysis
Patent

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Apparatus and method for producing a digitized transaction recor

Cryptography – Cryptanalysis
Patent

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Apparatus and method for producing scrambled digital video signa

Cryptography – Key management – Having particular key generator
Patent

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Apparatus and method for providing data security in a computer s

Cryptography – Cryptanalysis
Patent

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Apparatus and method for providing secured communications

Cryptography – Electric signal modification – Having production of printed copy
Patent

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Apparatus and method for providing secured communications

Cryptography – Electric signal modification – Having production of printed copy
Patent

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Apparatus and method for providing secured communications

Cryptography – Electric signal modification – Having production of printed copy
Patent

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Apparatus and method for quantum mechanical encryption for the t

Cryptography – Cryptanalysis
Patent

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Apparatus and method for re-encrypting data without unsecured ex

Cryptography – Key management – Having particular key generator
Patent

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Apparatus and method for receiving and decrypting encrypted data

Cryptography – Video cryptography – Copy protection or prevention
Patent

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Apparatus and method for scrambling and descrambling data...

Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate

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Apparatus and method for secure communication based on channel c

Cryptography – Key management – Having particular key generator
Patent

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Apparatus and method for secure communication based on channel c

Cryptography – Key management – Having particular key generator
Patent

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Apparatus and method for secure digital communication

Cryptography – Key management – Having particular key generator
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Apparatus and method for secure distribution of data

Cryptography – Key management – Having particular key generator
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