Henrick Hellström

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64 Answers

newest activity votes
12
Why does a broken hash function undermine an HMAC?
11
Is Wikipedia's table about SHA-2 collisions correct?
7
Can I use a one time pad key twice with random plaintext?
7
Is compressing data prior to encryption necessary to reduce plaintext redundancy?
7
How big an RSA key is considered secure today?
7
Rijndael vs. Serpent vs. Twofish: General comparison
6
How to perform file encryption using 128-Bit AES?
6
What is the correct way to generate cryptographically-secure pseudorandom numbers in C?
5
encrypt message with one digest 0-9 instead of 01-26
5
Using the same secret key for encryption and authentication in a Encrypt-then-MAC scheme
5
What's the difference between Trapdoor Functions and Encryption Functions?
5
Can RSA encryption produce collisions?
5
Difference between “Signature Algorithm” and “Signature Hash Algorithm” in X.509
5
X.509 CSR: Why does CA remove signature?
4
Is it possible to work out the hash algorithm from a list of known message-hash pairs?
4
Attack on DSA with signatures made with k, k+1, k+2
4
Potential vulnerability in DH key selection - am I understanding this right?
4
What is the difference between a hash and a permutation?
4
What is difference between PRG, PRF, and PRP
4
Security equivalence proofs for breaking RSA
4
Making ECDSA public keys one bit shorter
4
BigInteger in Java and Randomness
4
Checking a key before actually using it
4
Is the new preprint “An Algorithm For Factoring Integers” by Yingpu Deng and Yanbin Pan worth reading?
4
SHA-256 “midstate”
4
How does PBKDF1 work?
3
Does knowledge of original file size provide a cryptographic weakness?
3
What does the expression $1^n$ mean as a function argument?
3
How difficult is it to check if a group element is in a sub group?
3
How to solve the reverse of an equation that uses MOD?
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