Henrick Hellström

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63 Answers

newest activity votes
6
How to perform file encryption using 128-Bit AES?
2
Can one reduce the size of ECDSA-like signatures?
5
Can RSA encryption produce collisions?
4
Making ECDSA public keys one bit shorter
6
What is the correct way to generate cryptographically-secure pseudorandom numbers in C?
12
Why does a broken hash function undermine an HMAC?
3
Encryption algorithm that produces dummy output on incorrect passwords
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?
4
BigInteger in Java and Randomness
4
Checking a key before actually using it
1
Are there any signature schemes that protect against collusion by multiple parties?
3
How to generate successive stream-cipher keys?
5
Difference between “Signature Algorithm” and “Signature Hash Algorithm” in X.509
1
Does a public key absolutely need to be used to initiate an encrypted session?
5
X.509 CSR: Why does CA remove signature?
2
Security analysis of a “one-time pad” type hill cipher
7
How big an RSA key is considered secure today?
2
Can PBKDF2 be used to create an OTP to encrypt random plaintext?
4
Is the new preprint “An Algorithm For Factoring Integers” by Yingpu Deng and Yanbin Pan worth reading?
1
Is the $\ell$-Diffie Hellman Inversion easy when g is known?
3
What is an efficient random number generation algorithm
1
Are derived hashes weakening the root?
0
Combating traffic analysis over request-response protocols
7
Rijndael vs. Serpent vs. Twofish: General comparison
1
Realize a MAC using a Pseudo-random function?
2
Proof of batch RSA security
4
SHA-256 “midstate”
2
Passwords with same SALT. What does this mean?
1
Threshold Signatures for RSA and DSA
1 2 3