meta user
network profile
| bio | website | vyznev.net |
|---|---|---|
| location | Helsinki, Finland | |
| age | ||
| visits | member for | 1 year, 9 months |
| seen | May 12 at 7:27 | |
| stats | profile views | 90 |
I'm not really a cryptographer, I just play one on the internet.
Seriously, I'm just a programmer and mathematician interested in puzzles and information security. I don't have any kind of formal crypto training, but I've picked up a few things here and there over the years. Topics I'm particularly interested in include protocol design and analysis, classical ciphers and information-theoretically secure crypto techniques such as one time pads and secret sharing schemes.
Please consider any (original) code I post to Stack Overflow (and other Stack Exchange sites) to be released under CC-Zero unless stated otherwise. You may do whatever you want with it and don't have to credit me in any way, although of course that would be nice.
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May 26 |
comment |
What is the time complexity of the RC4 encryption & decryption algorithms? This is very similar to Complexity of ECB and OFB; note that most stream ciphers like RC4 behave very much like a block cipher in OFB mode. Anyway, the short answer is, it's all $O(n)$. |
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May 26 |
revised |
Complexity of ECB and OFB ITYM RC4, RC5 is a block cipher |
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May 26 |
answered | Attacks of the MAC construction $\mathcal{H}(m||k)$ for common hashes $\mathcal{H}$? |
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May 23 |
comment |
Is this a secure multiparty protocol? Wait... you say you "don't care about the confidentiality of inputs", but if I'm reading your description right, anyone who knows the function $F$ (which I'd normally assume to be public knowledge unless specified otherwise) and the input $D$ can obviously compute the output $F(D)$. So I must be missing something, but what? |
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May 23 |
answered | Hash decrypts key, key decrypts cipher… why? |
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May 16 |
revised |
Inverses in Truncated Polynomial Rings math and quote formatting, add link to source |
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May 16 |
revised |
Inverses in Truncated Polynomial Rings math and quote formatting |
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May 14 |
answered | Assistance Cracking Classical Cipher |
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May 13 |
comment |
Assistance Cracking Classical Cipher Alas, this question is not really on topic for crypto.SE either. The FAQ is pretty clear about it. (Personally, I kind of like these kinds of questions, at least as long as they look reasonably likely to be answerable and show more research effort than just "please break this cipher for me", but the consensus seems to be that they're all off topic here.) |
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May 13 |
revised |
Assistance Cracking Classical Cipher edited tags |
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May 13 |
answered | Is my HMAC secure if I have a complete series of HMAC'd prefix strings |
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May 12 |
reviewed | Approve suggested edit on history tag wiki |
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May 12 |
revised |
history wiki excerpt added 42 characters in body |
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May 12 |
suggested | suggested edit on history tag wiki excerpt |
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May 12 |
wiki | created history excerpt |
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May 12 |
revised |
How were the AES key and block length subsets of Rijndael selected? actually, it does exist on the NIST site |
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May 12 |
revised |
How were the AES key and block length subsets of Rijndael selected? add "history" tag |
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May 12 |
revised |
How were the AES key and block length subsets of Rijndael selected? added 1105 characters in body |
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May 12 |
answered | How were the AES key and block length subsets of Rijndael selected? |
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May 12 |
awarded | Excavator |
