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1d
comment OCB(Offset Code Book) authentication encryption
Downvoted because it's not clear what you're asking here.
Feb
3
comment implementation of authenticated encryption algorithms on GPU
What results were achieved?
Feb
3
comment implementation of authenticated encryption algorithms on GPU
"in the term of Cryptography is this plan True or NOT?" What are you asking about, exactly?
Jan
31
comment Is there a standard for hashing a list of strings?
Do you actually need the separator? Can you give me an example of an attack that works without separators that is prevented by using them?
Jan
30
comment How to calculate plaintext from modpower cipher
Integer factorization is in $NP \cap coNP$, but is not NP-complete.
Jan
27
comment Can BPS be used to encrypt a single integer, and restrict the output to a certain range?
Why do you think it's only a single integer? Do you understand how BPS works, and what is meant by 'characters' and 'alphabets' in the spec?
Jan
27
comment Can BPS be used to encrypt a single integer, and restrict the output to a certain range?
Your input to the algorithm is a string of "characters" in some alphabet. That alphabet could be binary, in which case your characters will be zeroes and ones. That alphabet could also be base-10, in which case your characters will be decimal digits.
Jan
25
comment Can BPS be used to encrypt a single integer, and restrict the output to a certain range?
You'd specify a regex for a four-digit year not greater than the current year, then pass that as a parameter to the FPE scheme. Internally, it compiles the regex to a state machine, then uses the description of that state machine to create a "ranking table" used during encryption and decryption.
Jan
23
comment How to encrypt a number using AES?
What research have you done? Have you googled the phrase "AES encryption padding"?
Jan
21
comment Why are obfuscators generally defined to be probabilistic algorithms, rather than deterministic ones?
Sometimes in theory, randomness lets you skirt weird paradoxes that would otherwise render a definition useless, like in interactive proofs. Maybe something similar happens with obfuscation definitions?
Jan
6
comment Hash function that allows to decide if A > B if you only have hash(A) and hash(B)?
Who paid for an implementation of it? Galois?
Jan
6
comment Hash function that allows to decide if A > B if you only have hash(A) and hash(B)?
Is this the multilinear maps one or the one that just uses PRFs? Would you be willing to send me the source @ThomasM.DuBuisson ?
Jan
5
comment Is secure lattice based cryptography in future?
The hardness of lattice cryptography is NOT reducible to an NP-hard problem. Worst-case lattice assumptions are usually similar to the NP-hard version of the problem, except with a larger approximation factor.
Jan
3
comment Is signing a plaintext sufficient?
You don't need to hash - typically hashes are used to implement the random oracle used in the proof of security of a signature scheme, but there exist signature schemes that don't use random oracles.
Dec
21
comment Secure, patent-free alternative to NTRU
Also it should be mentioned that if you want something NTRU-like but with a proven reduction to a worst-case lattice problem you might want to look at eprint.iacr.org/2013/004.
Dec
20
comment Secure, patent-free alternative to NTRU
OP: When Chris Peikert gives you advice on lattice cryptosystems, you take it.
Dec
18
comment Using HMAC as a nonce with AES-CTR encrypt-and-MAC
Ummmm.... Probably, as long as Poly1305 doesn't have some weird property that I'm not aware of. You just need to make sure your MAC is also a PRF in your adversarial setting.
Dec
8
comment Applying Vigenere on small strings with sorting capability
What is OPS? Do you mean OPE?
Dec
1
comment RSA & DH at risk due to math advances, will this eventually affect elliptic curves too?
Both of them use discrete log, but in different groups with very, very different algebraic properties. It's like saying a car is quite similar to a fighter jet because they both use fossil fuels.
Nov
30
comment Are there comprehensive alternatives to RSA?
I got curious too - check section 2.3.5: cseweb.ucsd.edu/~mihir/papers/gb.pdf