4. Cryptography
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Video scrambling apparatus and method based on space filling cur

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent

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Video scrambling apparatus and method based on space filling cur

Cryptography – Key management – Having particular key generator
Patent

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Video scrambling by segmenting video information lines

Cryptography – Key management – Having particular key generator
Patent

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Video scrambling system

Cryptography – Key management – Having particular key generator
Patent

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Video scrambling with variable function generator

Cryptography – Cryptanalysis
Patent

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Video scrambling, audio masking and data transmission methods fo

Cryptography – Key management – Having particular key generator
Patent

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Video signal descrambling apparatus

Cryptography – Key management – Having particular key generator
Patent

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Video signal format converting circuit

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent

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Video signal format converting circuit

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent

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Video signal format converting circuit

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent

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Video signal processor with copy prevention function

Cryptography – Cryptanalysis
Patent

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Video signal receiver with record protection

Cryptography – Video cryptography – Copy protection or prevention
Patent

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Video signal scramble system

Cryptography – Key management – Having particular key generator
Patent

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Video signal scrambling and descrambling apparatus

Cryptography – Key management – Having particular key generator
Patent

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Video signal scrambling apparatus

Cryptography – Key management – Having particular key generator
Patent

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Video signal scrambling system

Cryptography – Key management – Having particular key generator
Patent

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Video signal scrambling system employing full line reversal and

Cryptography – Key management – Having particular key generator
Patent

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VIDEO SIGNAL TRANSMITTING METHOD, VIDEO SIGNAL OUTPUT...

Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate

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Video slice and active region based multiple partial encryption

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Video slice and active region based multiple partial encryption

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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