Try before you buy software distribution and marketing system
Tuning system for television signal
TV scramble system for preventing illegal reception
TV set top box using GPS
Two channel audio scrambling system
Two non-orthogonal states quantum cryptography method and...
Two stage read-write method for transaction cards
Two-phase cryptographic key recovery system
Two-way data communication method and two-way data communication
Two-way public key authentication and key agreement for low-cost
Two-way QKD system with active compensation