Questions tagged [scrambling]

Scramblers use a secret spreading sequence or secret hop sequence, or some other information that must be kept secret from a potential jammer and/or listener. This mostly assumes sender and receiver to have a shared secret.

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How to perform the lfsr scrambling used in PCIe for 2 byte input?

In PCIe Gen 3 on-wards there is 128b/130b encoding used which scrambles incoming bit using a LFSR with polynomial: $$G(X) = X^{23} + X^ {21} + X^{16} + X^{8} + X^5 + X^2 + 1.$$ Is there any way to ...
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How did “Secure Voice” work on the old Air Force One's?

I recently visited the "Museum of Flight" where they have an old SAM 970, previously known as "Air Force One". Inside there is a comm station with many buttons designated "Secure Voice", as can be ...