Hottest Questions This Month

19

votes

5

answers

8k

views

Is there a bulletproof way to know a file has been successfully decrypted?

encryption

modified Nov 14 at 20:53 kelalaka 13.2k

15

votes

4

answers

8k

views

Creating cryptographic algorithms at runtime

algorithm-design forward-secrecy

modified Nov 14 at 22:13 SEJPM♦ 35.8k

24

votes

2

answers

5k

views

How are side-channel attacks executed? What does an attacker need to execute a side channel attack?

encryption side-channel-attack decryption

modified Nov 1 at 4:14 Squeamish Ossifrage 38.3k

26

votes

2

answers

3k

views

What are standard cryptographic assumptions?

provable-security complexity hardness-assumptions

modified Nov 8 at 13:23 Squeamish Ossifrage 38.3k

14

votes

2

answers

2k

views

How to check whether the permutation is random or not

permutation pseudo-random-permutation

modified Nov 3 at 17:06 Squeamish Ossifrage 38.3k

9

votes

2

answers

2k

views

Advantages and disadvantages of hash-based signatures

hash-signature one-time-signature

modified Oct 28 at 17:14 Gilles 'SO- stop being evil' 11.3k

11

votes

3

answers

1k

views

Why is the core ChaCha primitive not good for use in a CRCF? Why create BLAKE?

hash chacha blake2

modified yesterday kelalaka 13.2k

6

votes

2

answers

3k

views

Why might SHA-384 throughput be lower than SHA-512 throughput in hashcat and more secure?

hash sha-512

modified Nov 8 at 21:17 Squeamish Ossifrage 38.3k

3

votes

3

answers

904

views

Is using RSA with SHA-1 considered as secure as HMAC-SHA-1?

rsa sha-1

modified Nov 14 at 4:16 Squeamish Ossifrage 38.3k

7

votes

1

answer

460

views

Security levels in NIST Post-quantum project: e.g. AES-128 vs SHA-256

hash aes collision-resistance sha-256 brute-force-attack

modified Oct 23 at 18:26 Squeamish Ossifrage 38.3k

2

votes

2

answers

242

views

After Google's breakthrough: When will quantum computers break today's encryption?

post-quantum-cryptography

modified Oct 25 at 19:20 Squeamish Ossifrage 38.3k

5

votes

1

answer

322

views

Which elements of private RSA file are really constitutive of private key?

rsa openssl

modified Nov 6 at 18:19 Maarten Bodewes♦ 63.5k

5

votes

2

answers

138

views

If a new hash function were made that simply truncated sha-256 to the first N bits, how much insight would it provide into sha-256?

hash sha-256

modified yesterday fgrieu 92.6k

3

votes

2

answers

279

views

What is linearization attack

cryptanalysis algebraic-attack

modified Oct 29 at 7:40 kelalaka 13.2k

2

votes

2

answers

143

views

Why not use chacha derivatives (BLAKE, rumba) to make an [H]MAC for use with chacha? Why use poly1305?

hash merkle-damgaard poly1305

answered Nov 15 at 16:32 Squeamish Ossifrage 38.3k

-1

votes

1

answer

125

views

Factoring 2048 bit number is easy?

rsa prime-numbers factoring

modified Oct 31 at 14:07 Squeamish Ossifrage 38.3k

5

votes

2

answers

105

views

What is TPMFail attack and what are the countermeasures?

dsa side-channel-attack schnorr-signature tpm

modified 2 days ago kelalaka 13.2k

3

votes

2

answers

210

views

How was PC2 designed?

des

modified Nov 11 at 22:41 user1430 311

2

votes

1

answer

206

views

What happens when i sign a public key with its private key pair?

public-key signature

answered Nov 6 at 19:18 poncho 101k

0

votes

2

answers

121

views

Efficient function/algorithm/method to do modular exponentiation

rsa modular-arithmetic prime-numbers

modified Nov 12 at 20:51 kelalaka 13.2k

1

vote

1

answer

183

views

Getting unlimited amount of signatures - Risk?

signature protocol-design

answered Oct 21 at 14:36 poncho 101k

1

vote

2

answers

103

views

PBKDF2 with SHA-256/512 for low entropy input?

pbkdf-2 sha-512

modified Nov 9 at 2:33 Luis Casillas 10.8k

2

votes

1

answer

125

views

Transition to post-quantum cryptography

public-key post-quantum-cryptography

answered Nov 5 at 20:21 winstonhong 151

0

votes

1

answer

112

views

Any theory about period length for AES applied to itself?

aes cryptanalysis

modified Oct 27 at 17:46 J. Doe 355

4

votes

2

answers

105

views

Entropy preservation through cryptographic hash function

hash keys key-derivation sha-256 entropy

modified Nov 13 at 22:51 Paul Uszak 10.8k

4

votes

1

answer

109

views

Should we use the new CAESAR competition ciphers?

authenticated-encryption

modified Oct 25 at 17:41 Frank Denis 1,977

3

votes

1

answer

108

views

Is ECDSA signature strongly EUF-CMA?

signature dsa forgery

modified Nov 3 at 14:45 Squeamish Ossifrage 38.3k

0

votes

2

answers

65

views

Elliptic curve commitments mod p

elliptic-curves

answered yesterday kelalaka 13.2k

0

votes

2

answers

83

views

Would calculating the nth prime ruin encryption?

prime-numbers

answered Nov 7 at 21:13 kodlu 10.8k

2

votes

2

answers

78

views

RSA exercises example

rsa public-key

modified 1 hour ago Lery 4,101

3

votes

1

answer

127

views

Why does LastPass use exactly 100100 PBKDF2 rounds

encryption sha-256 pbkdf-2

modified Oct 25 at 21:11 kelalaka 13.2k

2

votes

1

answer

97

views

How many parties are needed to compute multiplication with BGW?

multiparty-computation

answered Nov 11 at 18:47 Yehuda Lindell 19.7k

1

vote

1

answer

123

views

Chacha20 internal counter/position and nonce

encryption nonce chacha

modified Nov 4 at 15:21 Squeamish Ossifrage 38.3k

0

votes

1

answer

72

views

Hashing using asymmetric cryptography

hash public-key cryptanalysis

modified Oct 30 at 14:37 Squeamish Ossifrage 38.3k

0

votes

1

answer

71

views

Any shortcut to compute the cipher text for AES applied $n$ times to initial message $m_0$? Or compute $n$ for given $m_0, m_n$?

aes cryptanalysis

modified Oct 28 at 15:13 fgrieu 92.6k

1

vote

1

answer

168

views

Are there any other highly trusted and secure symmetric encryption algorithms besides AES?

encryption aes symmetric

modified Oct 24 at 8:37 kelalaka 13.2k

0

votes

2

answers

61

views

What operations provide perfect secrecy other than modulo addition

one-time-pad perfect-secrecy

modified Nov 15 at 4:35 Squeamish Ossifrage 38.3k

1

vote

1

answer

76

views

Bad custom encryption

encryption hash

modified Oct 23 at 11:20 Maeher 4,466

2

votes

4

answers

72

views

Why use symmetric encryption with Public Key?

public-key symmetric

modified 2 days ago Squeamish Ossifrage 38.3k

1

vote

1

answer

53

views

Is there a way to make a black-box function side-channel attack resistant?

side-channel-attack

answered Oct 29 at 20:30 poncho 101k

1

vote

1

answer

67

views

RSA figuring out the recipient of a ciphertext

encryption rsa public-key

modified Nov 1 at 15:24 Squeamish Ossifrage 38.3k

1

vote

2

answers

110

views

Storing email addresses in plain sight

hash md5

modified Nov 6 at 5:15 Squeamish Ossifrage 38.3k

1

vote

1

answer

65

views

How is Shamir's Secret Sharing better than this simple 2-password technique?

modified Oct 25 at 20:23 Squeamish Ossifrage 38.3k

0

votes

2

answers

64

views

Is there a reason to use multiple hashing algorithms in a single system?

hash authentication

answered Nov 6 at 17:06 Squeamish Ossifrage 38.3k

2

votes

2

answers

74

views

What is the purpose of salting when integrating PBKDF2 with AES?

encryption aes pbkdf-2 salt

modified Oct 23 at 8:48 kelalaka 13.2k

1

vote

2

answers

117

views

What is the difference between pseudorandom permutation/pseudorandom function/block cipher?

pseudo-random-generator pseudo-random-function pseudo-random-permutation

modified Oct 28 at 15:04 Paul Uszak 10.8k

0

votes

1

answer

91

views

How much would removing enigmas biggest flaw improve it?

enigma

modified Oct 24 at 4:21 Legorooj 253

1

vote

2

answers

114

views

Does there exist a public database of RSA-2048 moduli and their factors?

rsa

modified Nov 1 at 15:28 Squeamish Ossifrage 38.3k

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