Cryptography

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Awarded 4152 times.
Does maximum length of CN in a x509 cert include the length of the OIDs?
Awarded 6 hours ago
Encrypting small packets with low data rate
Awarded 13 hours ago
Collision probability of MD5 over different attacks
Awarded yesterday
Key Scheduling of International Data Encryption Algorithm (IDEA)
Awarded yesterday
Security benefits of Ed25519 generating signatures deterministically
Awarded 2 days ago
Wanted: Simple ring signature example
Awarded 2 days ago
Encryption in which ciphertext is bigger than plaintext?
Awarded 2 days ago
Convert numeric value of RSA key to a .key file
Awarded 2 days ago
Is encrypted e-mail sent over TLS 1.3 a form of “forward secrecy” (similar to something like Signal)?
Awarded 2 days ago
DHKE choice of private keys
Awarded Oct 14 at 5:30
What is the link, if any, between Zero Knowledge Proof (ZKP) and Homomorphic encryption?
Awarded Oct 14 at 3:20
How is the x coordinate of a “point at infinity” encoded in a Secp256k1 signature?
Awarded Oct 13 at 14:30
Decrypting Ciphertext with partial Key Fragment using LFSR and Berlekamp-Massey
Awarded Oct 11 at 18:20
Diffie Hellman Problem (DHP) and Discrete Logarithmic Problem (DLP)
Awarded Oct 11 at 15:40
Prove that the following MAC is insecure
Awarded Oct 11 at 2:45
How can I calculate the entropy of an image? [closed]
Awarded Oct 10 at 17:10
Algorithm for computing square roots in $GF(2^n)$
Awarded Oct 10 at 15:40
private keys for multiple devices [closed]
Awarded Oct 10 at 14:50
How to show that this modification of CBC-MAC is insecure?
Awarded Oct 9 at 8:35
Prove that a function is PRF?
Awarded Oct 9 at 3:50
How to calculate a private key from public key on elliptic curve? [duplicate]
Awarded Oct 8 at 23:05
Key and IV lengths
Awarded Oct 8 at 18:50
HD (Hierarchical Deterministic) Keys using Safe Curves?
Awarded Oct 8 at 10:10
Range proof without knowing randomness
Awarded Oct 8 at 7:55
Difference between semi-honest and malicious adversary using Ideal Real Model Paradigm
Awarded Oct 7 at 10:45
What is the best way to derive a encryption key from the serial number?
Awarded Oct 7 at 9:05
How to retrieve the plaintext of a substitution ciphertext?
Awarded Oct 6 at 23:00
Why do digital signatures use a hash algorithm instead of a checksum?
Awarded Oct 6 at 16:30
AES256 GCM IV guidelines
Awarded Oct 6 at 10:05
Given a linear block-cipher,how can an attacker decrypt any plaintext value encrypted,using 128 chosen ciphertexts
Awarded Oct 4 at 22:00
How can we define division operation by using Fully homomorphic encryption
Awarded Oct 4 at 6:10
How to calculate plaintext from modpower cipher
Awarded Oct 3 at 23:40
Does XChaCha20 exist with similar properties to XSalsa20?
Awarded Oct 3 at 20:20
Pohlig-Hellman algorithm
Awarded Oct 3 at 16:25
The “openssl genrsa” command only generates a private key?
Awarded Oct 3 at 14:10
What do GnuPG sign-only keys mean?
Awarded Oct 3 at 7:25
Does the public key and private key for WhatsApp only remain within a WhatsApp account
Awarded Oct 2 at 9:40
OpenSSL ECDH key exchange mechanism
Awarded Oct 2 at 9:40
Question about IV/initialization vectors
Awarded Oct 2 at 6:25
Why is CBC-MAC with length appended not secure?
Awarded Oct 2 at 1:20
Why must the sender and receiver be synchronised in synchronous stream ciphers?
Awarded Oct 1 at 14:45
Why does adding PKCS#1 v1.5 padding make RSA encryption non-deterministic?
Awarded Oct 1 at 9:05
Best practises to generate IV for AES-CTR in this scenario
Awarded Sep 30 at 21:45
Is Bouncycastle RSA+OAEP implementation vulnerable to Manger’s attack?
Awarded Sep 30 at 21:15
Problem with LLL reduction on truncated LCG schemes
Awarded Sep 30 at 18:55
Can $d$ and $e$ be the same number in RSA?
Awarded Sep 30 at 16:45
SHA3-255, one bit less
Awarded Sep 29 at 14:45
How to encrypt the number one using RSA?
Awarded Sep 29 at 4:30
Tiger Tree Hash vs generic Merkle Tree
Awarded Sep 27 at 19:05
Why is ECB+CTR not a thing?
Awarded Sep 27 at 18:05
Decisional Diffie-Hellman assumption vs decisional bilinear Diffie-Hellman assumption
Awarded Sep 27 at 9:10
Meaning of Signature hash algorithm field in certificate
Awarded Sep 27 at 8:50
Can I obtain the hashing algorithm if I know both the input and the output?
Awarded Sep 26 at 17:35
Is DES secure under CBC?
Awarded Sep 26 at 15:40
How to prove correct decryption in Paillier cryptosystem
Awarded Sep 25 at 22:45
Can you help me understand Format Preserving Encryption?
Awarded Sep 25 at 16:25
Understanding how to proof an encryption scheme is perfectly secret
Awarded Sep 24 at 18:50
When is public-key crypto used / when is symmetric crypto used?
Awarded Sep 24 at 15:45
Extending key sizes in Salsa20 and ChaCha?
Awarded Sep 24 at 0:50
How to prove the security of block ciphers
Awarded Sep 23 at 23:20
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