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Cryptography

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Awarded 593 times.
How to determine the multiplicative inverse modulo 64 (or other power of two)?
Awarded Dec 7 at 11:21
Why Quantum Key Distribution (QKD) is impractical
Awarded Nov 16 at 20:55
HMAC-SHA1 vs HMAC-SHA256
Awarded Nov 11 at 23:11
How can I remove my personal data from my PGP public key?
Awarded Aug 10 at 14:07
Why is the IV passed in the clear when it can be easily encrypted?
Awarded Jul 26 at 23:16
Why is AES considered to be secure?
Awarded Jul 15 at 20:49
How bad it is using the same IV twice with AES/GCM?
Awarded Jul 10 at 1:32
Why do block ciphers need a non-linear component (like an S-box)?
Awarded Jun 17 at 11:47
Does Schnorr's 2021 factoring method show that the RSA cryptosystem is not secure?
Awarded Jun 5 at 20:03
FIPS 140-2 Compliant Algorithms
Awarded May 1 at 12:00
Polynomial-time Quantum Algorithms for Lattice Problems
Awarded Apr 22 at 10:33
What is the difference between a digest and a hash function?
Awarded Apr 12 at 13:15
Reason why “XOR” is a linear operation, but ordinary “addition” isn’t?
Awarded Apr 6 at 6:41
Why initialize SHA1 with specific buffer?
Awarded Mar 13 at 22:40
Is it better to encrypt before compression or vice versa?
Awarded Mar 13 at 16:41
Using cryptographically random password as both the password and the salt
Awarded Mar 11 at 7:02
Edwards / Montgomery ECC with Weierstrass Implementation?
Awarded Mar 4 at 19:36
For Diffie-Hellman, must g be a generator?
Awarded Feb 13 at 4:30
Are hash functions strong against quantum cryptanalysis and/or independent enough of mathematics?
Awarded Feb 8 at 15:09
Boss insists on storing SHA2(p) || SHA3(p), claiming it "doubles security"
Awarded Feb 3 at 13:48
Are one-time pads crackable in theory?
Awarded Jan 24 at 8:04
How long would it take to brute force an AES-128 key?
Awarded Jan 10 at 16:36
Unpredictability of X.509 serial numbers
Awarded Jan 7 at 21:25
Encrypt-then-MAC: Do I need to authenticate the IV?
Awarded Jan 5 at 22:55
Difference between X25519 vs. Ed25519
Awarded Dec 18, 2023 at 10:33
ECDSA Signature R|S to ASN1 DER Encoding question
Awarded Dec 4, 2023 at 7:06
Why is elliptic curve cryptography not widely used, compared to RSA?
Awarded Sep 5, 2023 at 12:16
Is it safe to create a public ID by hashing a private key?
Awarded Aug 28, 2023 at 20:55
What is the difference between ECDSA and EdDSA?
Awarded Aug 28, 2023 at 17:15
After ECDH with Curve25519, is it pointless to use anything stronger than AES-128?
Awarded Aug 22, 2023 at 9:25
What is the length of an RSA signature?
Awarded Aug 14, 2023 at 15:36
Why is SSL on top of TCP?
Awarded Aug 9, 2023 at 14:42
Which elliptic curves are quantum resistant?
Awarded Jul 20, 2023 at 2:03
Is there a standard for OpenSSL-interoperable AES encryption?
Awarded Jul 17, 2023 at 9:05
Should you change salt when changing password?
Awarded Jul 7, 2023 at 19:56
Is it safe to seed a random number generator from system time?
Awarded Jul 3, 2023 at 22:10
Does collision resistance imply (or not) second-preimage resistance?
Awarded May 20, 2023 at 16:16
Can an AI really generate random numbers?
Awarded Apr 26, 2023 at 2:42
Can Quantum Computers crack RSA and AES?
Awarded Mar 9, 2023 at 15:15
Summarize the mathematical problem at the heart of breaking a Curve25519 public key
Awarded Jan 30, 2023 at 18:58
Should we MAC-then-encrypt or encrypt-then-MAC?
Awarded Jan 26, 2023 at 14:09
Kyber and Dilithium explained to primary school students?
Awarded Jan 18, 2023 at 23:02
Is (AES-)GCM parallelizable?
Awarded Jan 14, 2023 at 8:08
What is the difference between a HMAC and a hash of data?
Awarded Jan 11, 2023 at 9:30
What is universal composability guaranteeing, specifically? Where does it apply, and where does it not?
Awarded Dec 13, 2022 at 1:27
Will IBM's Condor quantum processor run Shor's Algorithm to crack a 256-bit Elliptic Curve key?
Awarded Dec 9, 2022 at 18:32
When to use Argon2i vs Argon2d vs Argon2id?
Awarded Dec 7, 2022 at 7:51
Is TEA considered secure?
Awarded Nov 22, 2022 at 22:10
Is AES-128 quantum safe?
Awarded Nov 12, 2022 at 10:41
AES vs RSA - Which is stronger given two scenarios?
Awarded Oct 29, 2022 at 0:20
What is the advantage of AEAD ciphers?
Awarded Oct 28, 2022 at 15:28
Why do we use XTS over CTR for disk encryption?
Awarded Oct 7, 2022 at 19:52
What are the consequences of removing a single byte from a sha256 hash?
Awarded Sep 29, 2022 at 18:07
Is secp256r1 more secure than secp256k1?
Awarded Sep 20, 2022 at 22:25
Why do web-services tend to use preshared secret keys for client authentication instead of public keys?
Awarded Sep 13, 2022 at 15:00
Curve25519 over Ed25519 for key exchange? Why?
Awarded Sep 13, 2022 at 0:30
What is an elliptic curve cofactor?
Awarded Sep 6, 2022 at 8:09
what is the difference between proofs and arguments of knowledge?
Awarded Aug 12, 2022 at 9:05
How does encryption work in elliptic curve cryptography?
Awarded Aug 11, 2022 at 22:46
What's the difference between PBKDF and SHA and why use them together?
Awarded Jul 26, 2022 at 10:47
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