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I like crypto. Need I say more?


Sep
7
answered Is this a good way to encrypt a file?
Sep
7
answered S-box design criteria and random sboxes
Sep
5
comment Bitcoin Research
Would you mind rewording your question some? I'm having a hard time figuring out what you are asking. As worded you are asking if anyone knows of any research that is or has been done. The answer to that is clearly yes, someone does know of research that is/has been done. Are you wanting a list of research areas within the bitcoin realm that relate to cryptography? Is there something specific that a simple search of "bitcoin" on google scholar is not turning up that you are interested in?
Sep
5
answered Is Porticor's “homomorphic” key encryption something that can really be done or is it just marketing hype?
Sep
5
comment Why does ROT13 provide no cryptographic security?
Get the plaintext from the statistical analysis, then look at the substitution table used to get the plaintext. It will be very obvious. If you mean by only looking at the ciphertext, that would be hard to tell that it was the ROT13. You could, however, tell it was a simple substitution cipher by only looking at the ciphertext, but without further analysis, you couldn't recreate the substitution table.
Sep
5
comment How is block cipher padding verified for consistancy?
@Rook, based on what I have seen, yes. The padding oracle attack works any time one relies on some format of the decrypted message being present. If that format is not present, and that piece of information is leaked, a padding oracle is very likely. This is typically through padding, but is not limited to that.
Sep
4
awarded  Yearling
Sep
4
comment How does a padding oracle attack work?
I'm assuming you have read the relevant papers? If not, you should read them first and then post specific questions.
Aug
30
answered Why not encrypt salt?
Aug
28
comment Why pairing based crypto is suitable for some particular cryptographic primitives?
What published literature have you looked at? Something like this should give you a good introduction.
Aug
27
comment Self-expiring symmetric keys, or: cryptography in absence of secure deletion
Is the random stream only available for a certain time period? Also, you would need a trusted time source, no?
Aug
27
reviewed Approve suggested edit on malleability tag wiki excerpt
Aug
27
answered How is block cipher padding verified for consistancy?
Aug
24
revised Can Elgamal be made additively homomorphic and how could it be used for E-voting?
deleted 14 characters in body; edited tags; edited title
Aug
22
comment Why can't Homomorphic encryption schemes support algorithms with conditions/branching?
@Also, for an example of what D.W. is saying see the hcrypt project.
Aug
15
comment Using chi square for distinguishing between compressed and random data
See also crypto.stackexchange.com/questions/1287/…
Aug
15
comment Recommended Books for Cryptography : Theory and Implementation
Welcome to our site. We hope you find it useful. The reason you have not found similar questions to what you are looking for is that requests for books are considered off topic on this particular site. A good place to discuss this would be in Chat though.
Aug
15
revised Using chi square for distinguishing between compressed and random data
grammar
Aug
15
comment Using chi square for distinguishing between compressed and random data
I am not an expert in this, but the NIST tests might do a better job.
Aug
14
revised Homomorphic cryptosystems in RSA
deleted 22 characters in body