The most secure scrambler in common use is the:

Question

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Vocoder is the most secure scrambler in common use. It works by analyzing, synthesizing, and filtering speech signals. It transforms the analog signals into digital signals, which are then transmitted over a secure channel. Vocoder technology is capable of producing a high-quality vocal signal that is resistant to eavesdropping and interference. The other options (A, B, C) are not primarily used as secure scramblers in communication systems.

The Most Secure Scrambler in Common Use Is The