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Jan
19
comment Is frequency analysis the only attack on a simple substitution cipher?
I agree that I (perhaps falsely) jumped to the conclusion that Ned was talking about a monoalphabetic substitution, but I still think that picking out Vigenere and attacking that instead is a gross over-specification. At the very least, it needs an "if your cipher is actually Vigenere" note.
Jan
9
comment Is frequency analysis the only attack on a simple substitution cipher?
You seem to target Vigenère ciphers, but Ned was asking for attacks on substitution. These do not immediately translate, as well; this is why they're listed precisely like you listed them, on the Vigenère wikipedia page.
Aug
20
comment Possible to detect if a message is PGP encrypted/signed (ciphertext)
Somewhat related: there's even an XKCD on this ;-) xkcd.com/1181
Aug
6
comment Why does WPA-PSK not use Diffie-Hellman key exchange?
I don't get why this is the accepted answer. While it does provide an overview of the key establishment situation, it does not answer the question. I agree with @lxgr: in presence of an attacker that knows the PSK, it seems weird not to use DH. The PSK is not a secret at this point.
Nov
24
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Nov
23
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