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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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1 vote
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Is there a standard way of scrambling the output of AES?

So I needed symmetric encryption for my program. I landed on AES 192 bits in the CTR mode, because of some Computerphile videos on YouTube. After using it with the Node.js "crypto" lib ...
Rolands Laucis's user avatar
2 votes
1 answer

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 ...
Akash Pradhan's user avatar
6 votes
2 answers

Why does side-channel security focus on “shielding” rather than “jamming”?

I have always found it weird when in a crypto discussion people stressed the importance of making algorithms runtime-deterministic, to the point of avoiding any compiler optimisations. To me, it seems ...
leftaroundabout's user avatar
5 votes
1 answer

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 ...
TheHvidsten's user avatar