Henrick Hellström

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72 Answers

newest activity votes
13
Is Wikipedia's table about SHA-2 collisions correct?
may 20 at 22:31
13
Why does a broken hash function undermine an HMAC?
apr 10 '12 at 8:04
8
Can I use a one time pad key twice with random plaintext?
apr 3 '12 at 14:41
8
Is compressing data prior to encryption necessary to reduce plaintext redundancy?
mar 25 '12 at 9:33
7
Why is verification using DSA slower than verification with RSA?
may 27 at 15:51
7
How big an RSA key is considered secure today?
mar 3 '12 at 9:53
7
Rijndael vs. Serpent vs. Twofish: General comparison
feb 20 '12 at 9:10
6
The exact difference between a permutation and a substitution
may 30 at 12:55
6
How to perform file encryption using 128-Bit AES?
apr 22 '12 at 11:06
6
What is the correct way to generate cryptographically-secure pseudorandom numbers in C?
apr 11 '12 at 19:03
5
encrypt message with one digest 0-9 instead of 01-26
may 3 at 8:52
5
Using the same secret key for encryption and authentication in a Encrypt-then-MAC scheme
apr 23 at 10:26
5
What's the difference between Trapdoor Functions and Encryption Functions?
mar 31 at 22:03
5
Can RSA encryption produce collisions?
apr 15 '12 at 10:37
5
Difference between “Signature Algorithm” and “Signature Hash Algorithm” in X.509
mar 9 '12 at 7:29
5
X.509 CSR: Why does CA remove signature?
mar 6 '12 at 14:38
4
Is it possible to work out the hash algorithm from a list of known message-hash pairs?
apr 22 at 20:45
4
Attack on DSA with signatures made with k, k+1, k+2
apr 4 at 19:44
4
Potential vulnerability in DH key selection - am I understanding this right?
mar 27 at 11:31
4
What is the difference between a hash and a permutation?
mar 22 at 13:00
4
What is difference between PRG, PRF, and PRP
sep 23 at 20:00
4
Security equivalence proofs for breaking RSA
apr 25 '12 at 9:27
4
Making ECDSA public keys one bit shorter
apr 12 '12 at 8:55
4
BigInteger in Java and Randomness
mar 24 '12 at 9:01
4
Checking a key before actually using it
mar 21 '12 at 10:23
4
Is the new preprint “An Algorithm For Factoring Integers” by Yingpu Deng and Yanbin Pan worth reading?
feb 29 '12 at 17:07
4
SHA-256 “midstate”
feb 16 '12 at 7:27
4
How does PBKDF1 work?
feb 11 '12 at 18:45
3
When using HMAC, does key encoding matter?
jun 10 at 7:19
3
Does knowledge of original file size provide a cryptographic weakness?
may 9 at 23:24
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