Cryptography

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Awarded 567 times.
Why is elliptic curve cryptography not widely used, compared to RSA?
Awarded Sep 5 at 12:16
Is it safe to create a public ID by hashing a private key?
Awarded Aug 28 at 20:55
What is the difference between ECDSA and EdDSA?
Awarded Aug 28 at 17:15
After ECDH with Curve25519, is it pointless to use anything stronger than AES-128?
Awarded Aug 22 at 9:25
What is the length of an RSA signature?
Awarded Aug 14 at 15:36
Why is SSL on top of TCP?
Awarded Aug 9 at 14:42
Which elliptic curves are quantum resistant?
Awarded Jul 20 at 2:03
Is there a standard for OpenSSL-interoperable AES encryption?
Awarded Jul 17 at 9:05
Should you change salt when changing password?
Awarded Jul 7 at 19:56
Is it safe to seed a random number generator from system time?
Awarded Jul 3 at 22:10
Does collision resistance imply (or not) second-preimage resistance?
Awarded May 20 at 16:16
Can an AI really generate random numbers?
Awarded Apr 26 at 2:42
Can Quantum Computers crack RSA and AES?
Awarded Mar 9 at 15:15
Summarize the mathematical problem at the heart of breaking a Curve25519 public key
Awarded Jan 30 at 18:58
Should we MAC-then-encrypt or encrypt-then-MAC?
Awarded Jan 26 at 14:09
Kyber and Dilithium explained to primary school students?
Awarded Jan 18 at 23:02
Is (AES-)GCM parallelizable?
Awarded Jan 14 at 8:08
What is the difference between a HMAC and a hash of data?
Awarded Jan 11 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
Time Capsule cryptography?
Awarded Jul 18, 2022 at 0:06
Argon2 output length and parameter storage?
Awarded Jul 15, 2022 at 22:26
Why do the elliptic curves recommended by NIST use 521 bits rather than 512?
Awarded Jul 8, 2022 at 21:40
How does HOTP keep in sync?
Awarded Jun 28, 2022 at 22:26
What security do Cryptographic Sponges offer against generic quantum attacks?
Awarded Jun 26, 2022 at 4:33
(Why) should I avoid using a randomized IV for CTR mode?
Awarded Jun 24, 2022 at 14:32
Is there any difference between NIST and SECP curves in-terms of their algorithms and implementation?
Awarded Jun 19, 2022 at 19:47
What is the recommended number of iterations for Argon2?
Awarded Jun 8, 2022 at 1:50
Why are the lower 3 bits of curve25519/ed25519 secret keys cleared during creation?
Awarded May 27, 2022 at 20:49
What are the differences between proofs based on simulation and proofs based on games?
Awarded Apr 25, 2022 at 13:17
How easy is it in 2022 to find a SHA1 collision?
Awarded Apr 23, 2022 at 8:28
Does Curve25519 only provide 112 bit security?
Awarded Mar 28, 2022 at 14:08
Have any cryptographic breaks been executed in the real world since World War II?
Awarded Mar 8, 2022 at 7:06
Have any cryptographic breaks been executed in the real world since World War II?
Awarded Feb 25, 2022 at 6:41
Have any cryptographic breaks been executed in the real world since World War II?
Awarded Feb 23, 2022 at 5:37
Simply put, what does “perfect secrecy” mean?
Awarded Feb 4, 2022 at 2:50
Would this be considered a secure password hash?
Awarded Feb 2, 2022 at 7:46
Why aren't zero-knowledge proofs used in practice for authentication?
Awarded Jan 29, 2022 at 9:17
SHA-256 "almost unique"?
Awarded Jan 17, 2022 at 16:18
What is a Non-Interactive Zero Knowledge Proof?
Awarded Jan 12, 2022 at 15:11
What's the purpose of key-rotation?
Awarded Jan 7, 2022 at 6:21
Why "1" in 51% attack on Blockchain network
Awarded Dec 26, 2021 at 16:57
How can I understand whether my C implementation is constant-time or not (i.e. resistant to timing attacks)
Awarded Dec 15, 2021 at 19:07
Why is FIPS 140-2 compliance controversial?
Awarded Nov 24, 2021 at 8:21
Why is FIPS 140-2 compliance controversial?
Awarded Nov 24, 2021 at 6:36
Is every output of a hash function possible?
Awarded Nov 20, 2021 at 14:06
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