Cryptography

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Awarded 568 times.
Why would anyone choose 3DES over AES in software?
Awarded Aug 19, 2020 at 2:20
AES-GCM recommended IV size: Why 12 bytes?
Awarded Aug 18, 2020 at 9:40
How strong is the ECDSA algorithm?
Awarded Aug 18, 2020 at 8:30
Difference between Rijndael 128 / 256 blocksize implementations? (and impact of block size in general)
Awarded Aug 12, 2020 at 8:46
Why does RSA need p and q to be prime numbers?
Awarded Aug 5, 2020 at 13:56
Key derivation functions (KDF): What are they, what are their main purposes and how they can be used?
Awarded Jul 27, 2020 at 20:41
In RSA, why is it important to choose e so that it is coprime to φ(n)?
Awarded Jul 24, 2020 at 2:25
What is the meaning of "trapdoor" in cryptography?
Awarded Jul 19, 2020 at 22:32
Where and how to store private keys in web applications for private messaging with web browsers
Awarded Jul 19, 2020 at 5:40
Why did TLS 1.3 prohibit PGP authentication?
Awarded Jul 18, 2020 at 13:17
What data is saved in RSA private key?
Awarded Jul 9, 2020 at 11:55
Why Curve25519 for encryption but Ed25519 for signatures?
Awarded Jul 8, 2020 at 11:57
Is it easy to crack a hashed phone number?
Awarded Jul 3, 2020 at 5:26
How exactly was the finalist chosen in the NIST AES competition?
Awarded Jun 29, 2020 at 18:17
What is the main difference between a key, an IV and a nonce?
Awarded Jun 8, 2020 at 9:55
Why use an Initialization Vector (IV)?
Awarded Jun 8, 2020 at 9:55
Why do 5G, 4G, etc., use non-conventional algorithms?
Awarded Jun 7, 2020 at 4:32
Can I encrypt a message by swapping bits in the text?
Awarded Jun 3, 2020 at 5:40
Theoretically, what if I were to change some magic numbers in, say, AES?
Awarded May 29, 2020 at 14:12
What is the progress on the MIT LCS35 Time Capsule Crypto-Puzzle?
Awarded May 19, 2020 at 15:55
Encryption that purposefully take hours to decrypt
Awarded May 19, 2020 at 13:10
Why do I need to store the salt for generated hashes?
Awarded May 18, 2020 at 15:40
Encryption that purposefully take hours to decrypt
Awarded May 13, 2020 at 8:41
How to confirm my implementation is constant time
Awarded May 12, 2020 at 19:04
Pre-image resistant but not 2nd pre-image resistant?
Awarded May 1, 2020 at 17:08
Is there a string that's hash is equal to itself?
Awarded Apr 25, 2020 at 14:36
Why is it not possible to increase the size of RSA keys indefinitely?
Awarded Apr 22, 2020 at 13:45
Is there a feasible method by which NIST ECC curves over prime fields could be intentionally rigged?
Awarded Apr 21, 2020 at 22:05
Is sharing the modulus for multiple RSA key pairs secure?
Awarded Apr 20, 2020 at 20:36
Boolean Circuits vs Arithmetic Circuits
Awarded Apr 19, 2020 at 6:03
How can I make sure non-open source programs are really using end-to-end encryption?
Awarded Apr 8, 2020 at 23:50
A website that identifies an RNG from its output
Awarded Apr 3, 2020 at 1:45
A website that identifies an RNG from its output
Awarded Apr 2, 2020 at 14:35
Is RSA encryption with a private key the same as signature generation?
Awarded Apr 2, 2020 at 4:25
How to find modulus from a RSA public key?
Awarded Apr 1, 2020 at 21:45
Why is CBC with predictable IV considered insecure against chosen-plaintext attack?
Awarded Mar 27, 2020 at 17:45
Looking at hash output – is Base64 encoding in any way better than HEX encoding?
Awarded Mar 18, 2020 at 8:55
Are longer passwords really safer against brute force attacks?
Awarded Mar 17, 2020 at 22:55
How does a chosen ciphertext attack work, with a simple example?
Awarded Mar 10, 2020 at 14:20
7zip : Why does encrypting the same file with AES-256 not give the same output?
Awarded Feb 13, 2020 at 14:20
HMAC SHA256 vs RSA SHA256 - which one to use
Awarded Feb 13, 2020 at 11:20
Is 128-bit security still considered strong in 2020, within the context of both ECC Asym & Sym ciphers
Awarded Feb 3, 2020 at 22:25
Can a computationally unbounded adversary break any public-key encryption scheme?
Awarded Jan 27, 2020 at 17:15
Largest integer factored by Shor's algorithm?
Awarded Jan 27, 2020 at 16:35
Using the same RSA keypair to sign and encrypt
Awarded Jan 25, 2020 at 12:25
DSA vs. ElGamal vs. Schnorr
Awarded Jan 25, 2020 at 2:30
Does unbalancing a feistel cipher always improve security? Does it improve security at all?
Awarded Jan 23, 2020 at 1:10
Why is HMAC-SHA1 still considered secure?
Awarded Jan 22, 2020 at 23:50
Is it theoretically possible to construct a string that contains its own hash value?
Awarded Jan 21, 2020 at 22:15
RSA encryption with private key and decryption with a public key
Awarded Jan 15, 2020 at 20:10
Password hashing security of argon2 versus bcrypt/PBKDF2?
Awarded Jan 15, 2020 at 15:40
Why is the Keyspace of a Substitution Cipher not 2^26 but 2^88
Awarded Jan 10, 2020 at 23:35
In 2020, SHA-1 practically broken in chosen-prefix collision (CP-collision). Can double SHA-1 hashing prevent CP-collision?
Awarded Jan 8, 2020 at 23:35
What size should the HMAC key be with SHA-256?
Awarded Dec 29, 2019 at 18:50
repeating-key xor and hamming distance
Awarded Dec 29, 2019 at 18:05
What's the truth about this "absolutely unbreakable" cipher?
Awarded Dec 23, 2019 at 22:10
How were the DES S-box values determined?
Awarded Dec 20, 2019 at 9:00
RSA Proof of Correctness
Awarded Dec 15, 2019 at 12:55
Who is responsible for ensuring the trustworthiness of certificate authorities?
Awarded Dec 14, 2019 at 15:40
Cycles in SHA-256
Awarded Dec 13, 2019 at 13:35
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