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bio website twitter.com/otac0n
location Seattle, WA
age 28
visits member for 2 years, 9 months
seen Jan 19 at 20:04

I'm a father, a lover, a programmer and a guitarist.
Twitter: http://twitter.com/otac0n

Stack Overflow
Project Euler


Sep
29
comment Is there a secure cryptosystem that can be performed mentally?
@IlmariKaronen, I would allow pen and paper as long as the side channel attacks could be rather easily mitigated. That is, once you are done with your encryption, you should be able to destroy the internal state of the cypher.
Sep
29
comment Is there a secure cryptosystem that can be performed mentally?
This is along the lines of what I was looking for, but as @PaĆ­lo points out, I'm looking for a key-based system.
Sep
29
comment Is there a secure cryptosystem that can be performed mentally?
This is interesting, but not particularly secure, because simple frequency analysis could discover the message fairly easily.
Sep
29
comment Is there a secure cryptosystem that can be performed mentally?
Ah, Pontifex is exactly the kind of thing I was looking for.
Sep
29
comment Is there a secure cryptosystem that can be performed mentally?
What I mean is, if you were in duress and needed to communicate without your message being discovered. This would include being captured by a small faction, while still being able to leave coded messages, etc.
Sep
28
asked Is there a secure cryptosystem that can be performed mentally?
Aug
2
comment Properties of PRNG / Hashes
Well, some PRNGs are unacceptable for cryptography, regardless of the seed. I made this distinction to show that it is not sufficient to simply increase the period in order to make it secure.
Aug
2
awarded  Teacher
Aug
2
revised Properties of PRNG / Hashes
added 2 characters in body
Aug
2
answered Properties of PRNG / Hashes
Jul
21
awarded  Quorum
Jul
16
revised Is it feasible to build a stream cipher from a cryptographic hash function?
edited tags
Jul
13
accepted Is it feasible to build a stream cipher from a cryptographic hash function?
Jul
13
awarded  Scholar
Jul
13
awarded  Supporter
Jul
13
awarded  Editor
Jul
13
comment Is it feasible to build a stream cipher from a cryptographic hash function?
Also, I'm putting the H(plaintext) at the beginning so that it can all stream, and so that we can confirm the decrypted message.
Jul
13
revised Is it feasible to build a stream cipher from a cryptographic hash function?
deleted 6 characters in body
Jul
13
accepted With sufficient randomness, is XOR an acceptable mechanism for encrypting?
Jul
13
awarded  Student