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Feb
25
accepted Which one is fastest? Karatsuba or Montgomery multiplication?
Feb
25
comment Which one is fastest? Karatsuba or Montgomery multiplication?
@HenrickHellström Thanks for your comment. But why on x64 is the other way around? You just have bigger registers on x64.At each clock pulse you can transfer 64bits. That means that you can save at once 64bits and your word size is 64 bits. So i guess it will further improve the running time of the scheme Karatsuba-then-Montgomery. Or i am missing sth?
Feb
24
asked Which one is fastest? Karatsuba or Montgomery multiplication?
Feb
24
answered Bad/Crackable Encryption Example?
Feb
15
comment Low complexity implementation of a small blocksize cipher (< 64 bit)
Have you looked at present leightweight block cipher with 64 bit block size?
Feb
6
comment Guarding against cryptanalytic breakthroughs: combining multiple hash functions
It was my misunderstanding of your question.I didn't check thoroughly the case of different hash functions.
Feb
6
answered Guarding against cryptanalytic breakthroughs: combining multiple hash functions
Jan
29
accepted What are the differences between proofs based on simulation and proofs based on games?
Jan
29
accepted Is there any semantic difference between predicate encryption and functional encryption?
Jan
29
comment What are the differences between proofs based on simulation and proofs based on games?
Also it seems that simulation based definitions are completely different with game based and more abstract. As in simulation you are trying to prove that the idealized model is the best model that a security construction "must" follow in its security proof. So as i first step you have a simulation definition for the best things someone should prove and them with games and indistinguishability you prove that your construction is very close to the idealized one. Am i correct?
Jan
29
comment What are the differences between proofs based on simulation and proofs based on games?
Can you point out some "good" simulation based proofs where "X model the best that one could do"? Yes you clearly defined what i wanted to say in question 1 but question 2 contains some valuable info as well if it can be answered...
Jan
28
asked What are the differences between proofs based on simulation and proofs based on games?
Jan
16
asked Where i can find an AES implementation in python?
Dec
20
comment Why the following attack in common modulus RSA works?
and why $gcd(e_b,V)=1$ , according to your notation where $V=e_a \cdot d_a -1$
Dec
20
comment Why the following attack in common modulus RSA works?
So why in every book, research paper, textbook, the requirement is $e \cdot d \equiv 1 \phi(N)$ and not $e \cdot d \equiv 1 \lambda(N)$
Dec
20
comment Why the following attack in common modulus RSA works?
I don't understand the involvement of $\lambda(N) = lcm(p-1, q-1)$. As far as i know $e \cdot d \equiv 1 mod\phi(N)$
Dec
20
asked Why the following attack in common modulus RSA works?
Dec
18
comment Is there any semantic difference between predicate encryption and functional encryption?
Ok but you didn't answer to my question. Is there an obvious difference, a use case scenario whereby i cannot use PE in terms of functionality and security and i should use FE
Dec
18
comment Is there any semantic difference between predicate encryption and functional encryption?
It's better to point me the paper of the TCC.
Dec
13
asked Is there any semantic difference between predicate encryption and functional encryption?