Hottest Questions This Month

57

votes

6

answers

8k

views

Soft question: Examples where lack of mathematical rigour cause security breaches?

provable-security history

modified Jun 6 at 22:13 Squeamish Ossifrage 29.1k

15

votes

5

answers

4k

views

Is the decompression of compressed and encrypted data without decryption also theoretically impossible?

encryption compression

answered Jun 6 at 13:38 rmalayter 1,672

15

votes

3

answers

3k

views

Digital signature that is only verifiable by one specific person

public-key signature reference-request dsa

modified Jun 15 at 21:16 Max Barraclough 103

16

votes

1

answer

3k

views

Is a hash a zero-knowledge proof?

zero-knowledge-proofs

modified Jun 1 at 22:51 Geoffroy Couteau 10.4k

5

votes

10

answers

548

views

Soft question: What are examples of beautiful proofs in cryptography? [closed]

history

modified Jun 17 at 21:04 Marc Ilunga 547

8

votes

1

answer

3k

views

How long does it take to crack RSA 1024 with a PC?

rsa cryptanalysis factoring decryption

modified May 27 at 0:04 Z.T. 589

8

votes

3

answers

1k

views

Examples of protocols that are insecure when run concurrently

protocol-design zero-knowledge-proofs multiparty-computation universal-composability

answered Jun 17 at 10:19 Geoffroy Couteau 10.4k

6

votes

1

answer

2k

views

Cryptography and patents

encryption

modified May 30 at 20:54 Gilles 8,566

3

votes

1

answer

1k

views

In which public key encryption algorithms are the private and public key not reversible?

rsa public-key paillier

modified 2 hours ago Nobody 103

2

votes

4

answers

274

views

How to use “mod” related words in technical paper？

modular-arithmetic terminology

answered Jun 20 at 18:56 MooseBoys 101

8

votes

4

answers

199

views

Signature security proof in the Random Oracle model

signature provable-security random-oracle-model

modified Jun 2 at 11:09 Occams_Trimmer 1,851

6

votes

2

answers

205

views

Do you really need a KDF when you have a PRF?

key-derivation pseudo-random-function hkdf

modified Jun 11 at 23:40 Squeamish Ossifrage 29.1k

10

votes

2

answers

90

views

Are interactive proofs more secure their non-interactive counterpart?

zero-knowledge-proofs provable-security

modified Jun 19 at 18:46 Ella Rose♦ 17.2k

4

votes

2

answers

128

views

Does ChaCha20/Salsa have the same Bit Strength as AES for identical key sizes?

aes symmetric chacha

modified May 31 at 14:08 Squeamish Ossifrage 29.1k

4

votes

2

answers

311

views

Universal hash functions with homomorphic XOR property

universal-hash

modified Jun 4 at 16:03 Squeamish Ossifrage 29.1k

1

vote

5

answers

164

views

Why are password database breaches bad if cryptographic hashes can't be reversed? [closed]

hash passwords

modified Jun 19 at 23:21 Squeamish Ossifrage 29.1k

2

votes

3

answers

153

views

Does the use of English words weaken diceware passphrases [on hold]

passwords entropy

modified Jun 14 at 16:52 ruakh 121

4

votes

3

answers

170

views

Ways to make white-box cryptography AES implementation more difficult to be broken

aes software-obfuscation white-box

modified Jun 17 at 7:14 AleksanderRas 3,450

3

votes

2

answers

147

views

How are these AES MixColumn multiplication tables calculated?

aes finite-field

modified Jun 12 at 16:58 b degnan 2,095

4

votes

2

answers

233

views

Why is a common reference string needed in zero knowledge proofs?

zero-knowledge-proofs

modified Jun 8 at 11:14 Geoffroy Couteau 10.4k

6

votes

1

answer

147

views

Are DSA and ECDSA provably secure assuming DL security?

provable-security dsa

modified Jun 3 at 21:41 Occams_Trimmer 1,851

2

votes

1

answer

395

views

Distribution of safe primes generated using different techniques

prime-numbers safe-prime

modified Jun 18 at 2:36 Squeamish Ossifrage 29.1k

1

vote

3

answers

350

views

What happens if you increment MAX counter in AES-CTR?

aes block-cipher initialization-vector

answered Jun 10 at 13:58 Conrado 2,678

3

votes

1

answer

126

views

Are one time pads still secure when using randomly generated words as the pad?

one-time-pad

modified Jun 16 at 17:34 Squeamish Ossifrage 29.1k

3

votes

2

answers

203

views

Yarrow and weak cryptographic keys on macOS

keys entropy

modified Jun 17 at 11:25 Woodstock 159

0

votes

1

answer

156

views

Is there any theory to measures and determine the strength of an encryption protocol?

encryption

modified Jun 3 at 7:42 R1w 689

0

votes

2

answers

212

views

How Will Quantum Computing Change Cryptography's Future? [on hold]

quantum-cryptanalysis quantum-computing

modified Jun 20 at 7:55 Patriot 539

1

vote

2

answers

91

views

Invalid curve attack: finding low order points

elliptic-curves diffie-hellman

answered Jun 5 at 16:01 fkraiem 6,896

2

votes

2

answers

105

views

Was the Enigma's double stepping mechanism intentional?

encryption classical-cipher substitution-cipher enigma

answered Jun 17 at 17:26 Ilmari Karonen 37.1k

3

votes

1

answer

100

views

Induction is problematic in computational cryptography - Why?

complexity garbled-circuits

answered Jun 18 at 5:08 Yehuda Lindell 18.8k

4

votes

1

answer

93

views

Elliptic Curve Cryptography insecure when input does not lie on the curve?

elliptic-curves

modified Jun 12 at 3:57 Squeamish Ossifrage 29.1k

3

votes

3

answers

112

views

Largest message size for XChaCha20-Poly1305

authenticated-encryption chacha poly1305

modified Jun 10 at 23:10 Frank Denis 1,263

1

vote

1

answer

109

views

What is “spinal-tap grade” security?

ed25519 ed448

modified yesterday rmalayter 1,672

1

vote

2

answers

102

views

Alternatives to Mersenne Twister

pseudo-random-generator

modified Jun 5 at 16:01 Squeamish Ossifrage 29.1k

0

votes

1

answer

185

views

What's the number of unique possible Cayley tables in a 16*16 grid for XOR'ing single hex characters?

xor group-theory

modified 2 days ago fgrieu 83.1k

3

votes

2

answers

82

views

What are linear and non-linear elements in cryptography?

encryption xor

answered May 31 at 14:57 Squeamish Ossifrage 29.1k

2

votes

1

answer

162

views

Asymmetric CSPRNG where the public key only works backward

random-number-generator

modified Jun 5 at 7:40 DannyNiu 1,668

2

votes

2

answers

125

views

Hashing a hash for authentication

authentication key-derivation sha-256

answered Jun 7 at 22:12 Ilmari Karonen 37.1k

2

votes

2

answers

91

views

Verify partial message given hash of full message

hash verifiability checksum

modified Jun 16 at 13:54 Squeamish Ossifrage 29.1k

2

votes

1

answer

68

views

Are there any security risks in using Elliptic Curves defined over fields $\mathbf{F}_{p^n}$ where $n>1$

elliptic-curves finite-field

answered Jun 18 at 15:15 corpsfini 116

2

votes

1

answer

137

views

Blowfish encryption with different keys produces same ciphertext

blowfish

modified May 28 at 12:48 Maarten Bodewes♦ 56.6k

3

votes

1

answer

83

views

PRP vs PRF for the F-function of a Feistel network

pseudo-random-function pseudo-random-permutation feistel-network

modified Jun 20 at 13:35 SEJPM♦ 30k

4

votes

1

answer

129

views

+50

Complete Attack on RLWE Key Exchange with reused keys, without signal leakage

key-exchange post-quantum-cryptography rlwe

modified Jun 20 at 19:24 Bissi 152

3

votes

2

answers

78

views

Is lattice-based cryptography relevant in symmetric cryptography?

symmetric lattice-crypto

modified 2 days ago forest 6,156

1

vote

1

answer

85

views

Encrypting more than ~64GiB with AES-GCM - Integrity

encryption authenticated-encryption integrity aes-gcm

modified Jun 20 at 10:48 nullptrcpp 18

1

vote

2

answers

51

views

How are “string-messages” converted to “number-messages”?

encryption

answered Jun 7 at 11:39 RalphS 43

-1

votes

3

answers

106

views

Randomness Testing

randomness permutation statistical-test

modified Jun 19 at 23:02 Paul Uszak 7,888

0

votes

2

answers

82

views

$\alpha^{2^{m} + 1}$ is a generator of $\operatorname{GF}(2^m)$?

s-boxes

modified yesterday Dilip Sarwate 2,244

Top Questions

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.