11
votes
Stuck on a cryptanalytical research project
The fact that your attack only works when you're using "normal math" and not "cryptographical math" (by which I assume you probably mean modular arithmetic, or perhaps arithmetic ...
- 45.5k
4
votes
Confusion+Diffusion comparison table? (e.g. with Avalanche Criterion / SAC)
xor-streaming ciphers have no (0, zero, zilch) diffusion - you switch 1 bit in the ciphertext, you know which single bit in the plaintext after decryption will be flipped.
Indeed, there is no ...
- 132k
2
votes
Stuck on a cryptanalytical research project
There is already a good answer. In addition, if you think actual cryptosystems used today are at risk but you believe "clock arithmetic" works makes me think actual (public key) ...
- 19.2k
1
vote
Rule 30 based block cipher
Knowing a single plaintext/ciphertext pair $(p,c)$ at least as large as the password is enough to decipher any ciphertext $c'$ at least as large as $c$ encrypted with the same password.
Just compute $...
- 132k
1
vote
Rule 30 based block cipher
There have been people considering CA for cryptanalysis. The problem is that CA leads to an unbounded state and this uses unbounded memory. Thus some dubious claims of "breaking" ...
- 19.2k
1
vote
Accepted
Differential trails in differential cryptanalysis
If you can see that for a single Sbox the differential is independent of the input, the same holds for a collection of Sboxes forming the differential trail.
That example is directly from Heys' ...
- 19.2k
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