Cryptography

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Awarded 1726 times.
Why is lattice-based cryptography believed to be hard against quantum computer?
Awarded Apr 18, 2022 at 18:05
Advantage of $\operatorname{GF}(2^8)$ over $\mathbb Z/2^8\mathbb Z$ in AES/Rijndael
Awarded Apr 16, 2022 at 17:05
Current Consensus on Security of Lattice Based Cryptography?
Awarded Apr 12, 2022 at 21:27
What characters does AES output?
Awarded Apr 9, 2022 at 4:48
What is an extendable output function?
Awarded Apr 5, 2022 at 23:48
Why Victor must not know which tunnel Peggy chooses?
Awarded Mar 30, 2022 at 11:20
Recommended key size for DKIM
Awarded Mar 28, 2022 at 17:51
How are timestamps verified?
Awarded Mar 18, 2022 at 14:25
Why does the Signal protocol use AES/CBC instead of AES/GCM?
Awarded Mar 2, 2022 at 16:05
Why is the complexity of RSA-1024 80 bit and not 86 bit?
Awarded Mar 1, 2022 at 22:08
Is there any famous protocol that were proven secure but whose proof was wrong and lead to real world attacks?
Awarded Feb 25, 2022 at 19:18
Have any cryptographic breaks been executed in the real world since World War II?
Awarded Feb 22, 2022 at 19:05
What happens to entropy after hashing?
Awarded Feb 22, 2022 at 17:45
Why is there the option to use NIST P-256 in GPG?
Awarded Feb 14, 2022 at 23:36
Cryptographically safe lookup of value in a set
Awarded Feb 12, 2022 at 0:06
Difference between computational and statistical indistinguishabilities
Awarded Feb 11, 2022 at 6:18
Encryption with "constant" initialization vector considered harmful
Awarded Feb 6, 2022 at 1:25
Hash paradox in an image file that contain hash text?
Awarded Feb 1, 2022 at 9:05
Argon2 - memory setting - lower bound?
Awarded Jan 29, 2022 at 19:42
Why does "gpg --export-secret-keys" ask for a password? [closed]
Awarded Jan 19, 2022 at 7:48
What is wrong with XOR encryption with secure PRNG?
Awarded Jan 9, 2022 at 22:45
Two different keys decrypting same content
Awarded Jan 5, 2022 at 14:42
How to derive a symmetric key from ECDH shared secret?
Awarded Dec 30, 2021 at 10:06
Can RSA be used to encrypt p?
Awarded Dec 28, 2021 at 17:12
Why "1" in 51% attack on Blockchain network
Awarded Dec 22, 2021 at 13:18
How can I understand whether my C implementation is constant-time or not (i.e. resistant to timing attacks)
Awarded Dec 14, 2021 at 17:40
In search of a pedagogically simple example of asymmetric encryption routine?
Awarded Dec 11, 2021 at 16:40
Is it better to encrypt before compression or vice versa?
Awarded Dec 7, 2021 at 20:51
WhatsApp end-to-end encryption
Awarded Dec 4, 2021 at 10:56
Curve25519 over Ed25519 for key exchange? Why?
Awarded Dec 2, 2021 at 21:52
How to determine the multiplicative inverse modulo 64 (or other power of two)?
Awarded Nov 30, 2021 at 18:18
Why use $(r,s)$ instead of $(r,s^{-1})$ as DSA signature?
Awarded Nov 26, 2021 at 2:11
Why is FIPS 140-2 compliance controversial?
Awarded Nov 22, 2021 at 13:18
How to prove identity without revealing identity
Awarded Nov 14, 2021 at 5:48
Is double SHA-256 the best choice for Bitcoin?
Awarded Nov 10, 2021 at 12:11
Initialize a PRNG with a password
Awarded Nov 9, 2021 at 23:17
Why are HOTP and TOTP implementations all using 6 digits and not more?
Awarded Nov 9, 2021 at 2:05
Is RSA-OAEP deprecated?
Awarded Nov 8, 2021 at 18:25
How do zero knowledge protocol with vertex-3-coloring work?
Awarded Nov 5, 2021 at 18:47
Formally, what is AES?
Awarded Nov 5, 2021 at 9:04
Nash cryptosystem
Awarded Nov 4, 2021 at 23:18
How can I convert a DER ECDSA signature to ASN.1?
Awarded Nov 1, 2021 at 16:42
ECDSA Signature R|S to ASN1 DER Encoding question
Awarded Nov 1, 2021 at 16:32
Error-correcting Code VS Lattice-based Crypto
Awarded Nov 1, 2021 at 13:21
Can elliptic curve cryptography encrypt with public key and decrypt with private key like RSA?
Awarded Oct 17, 2021 at 8:32
Does adding a salt to the message before HMAC processing add any security?
Awarded Oct 8, 2021 at 17:25
Is there any difference between NIST and SECP curves in-terms of their algorithms and implementation?
Awarded Oct 7, 2021 at 0:11
Are DSA and ECDSA provably secure assuming DL security?
Awarded Oct 6, 2021 at 11:16
Would SHA1 be broken by sheer brute force, even if it had no weaknesses of its own?
Awarded Oct 5, 2021 at 15:40
Ed25519 is a signature or just elliptic curve
Awarded Sep 30, 2021 at 15:11
How distinct are the meanings of the terms "CSPRNG," "DRBG" and "stream cipher"?
Awarded Sep 30, 2021 at 10:32
Why is a CSR signed and which key is used for signing?
Awarded Sep 28, 2021 at 8:04
Why is SHA3 more secure than SHA2?
Awarded Sep 28, 2021 at 7:26
Why cannot I assume that cryptography published in venues/journals handled by the same publishers as prestigious journals is serious?
Awarded Sep 24, 2021 at 21:50
What does the work "An Efficient Quantum Algorithm for Lattice Problems Achieving Subexponential Approximation Factor" mean?
Awarded Sep 23, 2021 at 4:18
Why is the polynomial of an LFSR called so?
Awarded Sep 22, 2021 at 13:11
ed25519 ssh public key is always 80 characters long?
Awarded Sep 22, 2021 at 10:17
How realistic is a dictionary attack on a secure remote password protocol (SRP) verifier?
Awarded Sep 11, 2021 at 12:07
RSA Private Exponent Generation according to FIPS 186-4 in openssl v1
Awarded Sep 8, 2021 at 12:56
Why Quantum Key Distribution (QKD) is impractical
Awarded Sep 2, 2021 at 16:36
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