4. Electrical computers and digital processing systems: support
  5. Multiple computer communication using cryptography
  6. Protection at a particular protocol layer

Katherine S. Lam

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Digital hidden data transport (DHDT)

Cryptography – Video cryptography – Video electric signal masking
Reexamination Certificate

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Digital system for embedding a pseudo-randomly modulated...

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Protection at a particular protocol layer
Reexamination Certificate

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Multimedia adaptive scrambling system (MASS)

Cryptography – Communication system using cryptography – Pseudo-random sequence scrambling
Reexamination Certificate

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