User PulpSpy

99 votes

Time Capsule cryptography?

answered Sep 3, 2011 at 14:31

40 votes

Are there two known strings which have the same MD5 hash value?

answered Jan 30, 2012 at 16:53

38 votes

Random oracle model proofs and programmability

answered Dec 8, 2011 at 17:37

22 votes

Accepted

ElGamal: Multiplicative cyclic group and key generation

answered Jan 5, 2012 at 17:14

21 votes

Accepted

How to fairly select a random number for a game without trusting a third party?

answered Sep 24, 2011 at 0:34

19 votes

Accepted

Can Elgamal be made additively homomorphic and how could it be used for E-voting?

answered Aug 24, 2012 at 14:08

16 votes

Is H(k||length||x) a secure MAC construction?

answered Nov 14, 2011 at 20:15

16 votes

Definition of textbook RSA

answered Dec 12, 2011 at 20:10

16 votes

What is the importance of Modular arithmetic in cryptography?

answered Dec 12, 2011 at 15:08

15 votes

Accepted

Replacing the Rijndael S-Box?

answered Jul 13, 2011 at 18:39

15 votes

Accepted

Are there asymmetric cryptographic algorithms that are not based on integer factorization and discrete logarithm?

answered Jul 19, 2011 at 15:24

14 votes

advances in usability for cryptography/authentication

answered Jul 13, 2011 at 15:25

13 votes

Accepted

Why use a 1-2 Oblivious Transfer instead of a 1 out of n Oblivious Transfer?

answered Jul 13, 2011 at 17:22

13 votes

Division in paillier cryptosystem

answered Mar 13, 2012 at 3:35

12 votes

Why is RSA encryption key based on modulo $\varphi(n)$ rather than modulo $n$?

answered Feb 1, 2012 at 14:50

12 votes

Accepted

Is there an algorithm or hardware that can sign/verify natural time?

answered Oct 12, 2011 at 15:23

12 votes

Accepted

Bitcoin Research

answered Sep 5, 2012 at 19:43

11 votes

How to attack a classical cipher using known partial plaintext?

answered Oct 12, 2011 at 16:10

11 votes

Accepted

Is it possible to validate a Public Key in RSA?

answered Jan 10, 2012 at 15:10

10 votes

Proving knowledge of a preimage of a hash without disclosing it?

answered Jan 30, 2012 at 1:49

10 votes

Why is MixColumns omitted from the last round of AES?

answered Nov 29, 2011 at 16:36

10 votes

Guarding against cryptanalytic breakthroughs: combining multiple hash functions

answered Jul 29, 2011 at 16:11

10 votes

Approach towards anonymous e-voting

answered Aug 14, 2012 at 16:30

9 votes

Accepted

Are there any differences between PIR, oblivious transfer and differential privacy?

answered Jun 18, 2012 at 14:11

9 votes

Why do we need special key-wrap algorithms?

answered Nov 1, 2011 at 14:47

9 votes

Salts, how does the script know what the salt is?

answered Jan 30, 2012 at 2:11

9 votes

Would it be secure to use random numbers from random.org in a cryptographic solution?

answered Jan 11, 2012 at 15:46

9 votes

Provable Encryption

answered Jan 26, 2012 at 15:15

8 votes

Accepted

Software implementation of a commutative cipher?

answered Nov 30, 2011 at 3:09

8 votes

Accepted

Applications of Group Ciphers

answered Aug 12, 2011 at 14:48

Stack Exchange Network

89 Answers

Time Capsule cryptography?

Are there two known strings which have the same MD5 hash value?

Random oracle model proofs and programmability

ElGamal: Multiplicative cyclic group and key generation

How to fairly select a random number for a game without trusting a third party?

Can Elgamal be made additively homomorphic and how could it be used for E-voting?

Is H(k||length||x) a secure MAC construction?

Definition of textbook RSA

What is the importance of Modular arithmetic in cryptography?

Replacing the Rijndael S-Box?

Are there asymmetric cryptographic algorithms that are not based on integer factorization and discrete logarithm?

advances in usability for cryptography/authentication

Why use a 1-2 Oblivious Transfer instead of a 1 out of n Oblivious Transfer?

Division in paillier cryptosystem

Why is RSA encryption key based on modulo $\varphi(n)$ rather than modulo $n$?

Is there an algorithm or hardware that can sign/verify natural time?

Bitcoin Research

How to attack a classical cipher using known partial plaintext?

Is it possible to validate a Public Key in RSA?

Proving knowledge of a preimage of a hash without disclosing it?

Why is MixColumns omitted from the last round of AES?

Guarding against cryptanalytic breakthroughs: combining multiple hash functions

Approach towards anonymous e-voting

Are there any differences between PIR, oblivious transfer and differential privacy?

Why do we need special key-wrap algorithms?

Salts, how does the script know what the salt is?

Would it be secure to use random numbers from random.org in a cryptographic solution?

Provable Encryption

Software implementation of a commutative cipher?

Applications of Group Ciphers