Henrick Hellström

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63 Answers

newest activity votes
3
Encryption algorithm that produces dummy output on incorrect passwords
3
How to generate successive stream-cipher keys?
3
What is an efficient random number generation algorithm
3
Is Common Name encoded in the certificate?
2
Is there a way to do fair exchange between two parties who don't trust each other?
2
What does $(\mathbb{Z}_n^*)^2$ mean?
2
Implementing secret reconstruction in Shamir's Secret Sharing
2
DSA signatures with related k and unknown payloads
2
What is the difference between a HMAC and a hash of data?
2
Deriving HMAC key and cipher key from passphrase?
2
Safety of a pre-keyed DH-Key Exchange
2
Is RSASSA-PKCS1-v1_5 a good signature scheme for new systems?
2
Can one reduce the size of ECDSA-like signatures?
2
Security analysis of a “one-time pad” type hill cipher
2
Can PBKDF2 be used to create an OTP to encrypt random plaintext?
2
Proof of batch RSA security
2
Passwords with same SALT. What does this mean?
2
Why do we need asymmetric algorithms for key exchange?
1
Generate fixed length cipher text from arbitrary length plaintext
1
how much is secure to encrypt a password using itself (as encryption key) for storing it on a unsecure media?
1
Is AES really used for Top Secret stuff?
1
Knowing a valid salted hash for an unknown secret, is it possible to compute another valid hash?
1
Does Linear Cramer-Shoup have pseudo-random ciphertexts?
1
Timing attack on modular exponentiation
1
Is there a practical security difference between XXX-bit encryption?
1
Are there any signature schemes that protect against collusion by multiple parties?
1
Does a public key absolutely need to be used to initiate an encrypted session?
1
Is the $\ell$-Diffie Hellman Inversion easy when g is known?
1
Are derived hashes weakening the root?
1
Realize a MAC using a Pseudo-random function?
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