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Method and apparatus for detecting unauthorized distribution of

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
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Method and apparatus for detection of loss of cipher...

Cryptography – Communication system using cryptography – Symmetric key cryptography
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Method and apparatus for detection of loss of cipher...

Cryptography – Communication system using cryptography – Symmetric key cryptography
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Method and apparatus for digital encryption

Cryptography – Particular algorithmic function encoding
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Method and apparatus for digital signal processing

Cryptography – Communication system using cryptography – Time segment interchange
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Method and apparatus for digital signature authentication

Cryptography – Particular algorithmic function encoding – Public key
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Method and apparatus for digital signature authentication

Cryptography – Particular algorithmic function encoding – Public key
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Method and apparatus for digital signature authentication

Cryptography – Particular algorithmic function encoding – Public key
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Method and apparatus for digital signature authentication

Cryptography – Particular algorithmic function encoding
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Method and apparatus for digital signature authentication

Cryptography – Particular algorithmic function encoding – Public key
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Method and apparatus for digital transmission incorporating...

Cryptography – Video cryptography
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Method and apparatus for digitally removing or defeating effects

Cryptography – Cryptanalysis
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Method and apparatus for digitizing a scrambled analog video sig

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
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Method and apparatus for distorting a speech signal

Cryptography – Communication system using cryptography – Frequency shift or inversion
Patent

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Method and apparatus for distributed management of files

Cryptography – Key management – Key distribution
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Method and apparatus for distributing and updating private...

Cryptography – Key management
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Method and apparatus for distributing authorization to...

Cryptography – Cellular telephone cryptographic authentication
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Method and apparatus for distributing authorization to...

Cryptography – Cellular telephone cryptographic authentication
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Method and apparatus for distributing information products

Cryptography – Cryptanalysis
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Method and apparatus for distributing keys for decrypting...

Cryptography – Key management
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