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Information recording system

Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate

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Information recording/replaying apparatus and method

Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate

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Information recording/replaying apparatus and method

Cryptography – Video cryptography – Copy protection or prevention
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Information recording/reproducing apparatus for converting and p

Cryptography – Cryptanalysis
Patent

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Information recording/reproducing apparatus with security...

Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate

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Information recording/reproducing device

Cryptography – Video cryptography – Copy protection or prevention
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Information recording/reproducing device and information...

Cryptography – Video cryptography
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Information recording/reproducing system

Cryptography – Video cryptography – Copy protection or prevention
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Information recording/reproducing system being able to limit...

Cryptography – Key management – Key escrow or recovery
Reexamination Certificate

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Information reproducing apparatus

Cryptography – Video cryptography – Video electric signal modification
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Information reproducing method and apparatus having protect func

Cryptography – Cryptanalysis
Patent

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Information security device, exponentiation device, modular...

Cryptography – Particular algorithmic function encoding
Reexamination Certificate

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Information security device, prime number generation device,...

Cryptography – Particular algorithmic function encoding
Reexamination Certificate

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Information security subscriber trust authority transfer...

Cryptography – Key management
Reexamination Certificate

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Information security using digital holography

Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate

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Information security via dynamic encryption with hash function

Cryptography – Key management – Having particular key generator
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Information sending system and method for sending encrypted...

Cryptography – Communication system using cryptography – Time segment interchange
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Information sending system, information sending device,...

Cryptography – Key management – Key distribution
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Information sending system, information sending device,...

Cryptography – Key management – Key distribution
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Information signal transmission system

Cryptography – Key management – Having particular key generator
Patent

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