Cryptography Stack Exchange

0

votes

1

answer

37

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How does the Concat KDF work?

modified 2 mins ago fgrieu♦ 106k

2

votes

1

answer

53

views

Algorithm to find similar SHA3-512 digest

algorithm-design

modified 12 mins ago fgrieu♦ 106k

2

votes

2

answers

82

views

Need help understanding math behind Rijndael S-Box

aes finite-field rijndael

modified 57 mins ago kelalaka 23.2k

0

votes

1

answer

27

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AES 128-bit encryption - not getting expected results

aes ecb

modified 2 hours ago kelalaka 23.2k

1

vote

1

answer

40

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Why shouldn't cryptocurrency hash algorythms, resist side channel attack?

hash key-derivation cryptocurrency side-channel-attack

modified 2 hours ago kelalaka 23.2k

1

vote

1

answer

58

views

Getting a random number on an STM32L0x1 device for SRP6a

random-number-generator srp

modified 2 hours ago Community♦ 1

1

vote

1

answer

33

views

Zero-knowledge proof for multiplication in the exponent

zero-knowledge-proofs

modified 2 hours ago kelalaka 23.2k

1

vote

1

answer

33

views

Using a nonce as a salt for key derivation

key-derivation authenticated-encryption salt nonce libsodium

answered 2 hours ago kelalaka 23.2k

0

votes

0

answers

13

views

How to estimate the maximum computational cost bound for Key Derivation Functions (KDFs) before it becomes useless security-wise?

symmetric key-derivation scrypt argon2 computational-complexity-theory

asked 6 hours ago caveman 219

2

votes

1

answer

152

views

Using YubiKey to store a PIN-protected secret for disk encryption

rsa disk-encryption smartcard

modified 9 hours ago Community♦ 1

0

votes

0

answers

13

views

Black-box secret sharing schemes

asked 12 hours ago Mathdropout 41

0

votes

0

answers

11

views

Is establishing a secret key possible given this characteristic primitive?

protocol-design protocol-analysis three-pass-protocol

asked 14 hours ago bernd feinman 101

5

votes

2

answers

159

views

Fast cryptographic hash function for short inputs

hash implementation pseudo-random-generator

modified 14 hours ago d1v 51

-2

votes

0

answers

45

views

Why are the MD5 Hash values the same?

hash sha-1 md5 cryptocurrency

modified 19 hours ago Stack 1

0

votes

2

answers

50

views

AES confused about how ShiftRows() step works

aes

answered 23 hours ago Crowman 121

0

votes

1

answer

41

views

Voronoi regions of lattices with dimensions $\leq 16$

post-quantum-cryptography lattice-crypto

answered yesterday LeoDucas 837

5

votes

3

answers

259

views

Decrypting small integers under RSA

rsa modular-arithmetic factoring hardness-assumptions

modified yesterday fgrieu♦ 106k

0

votes

1

answer

23

views

PRF and deterministic polytime function implie PRG

pseudo-random-generator pseudo-random-function

answered yesterday Mark 3,248

1

vote

3

answers

193

views

3DES security when K1=K3

3des

modified yesterday fgrieu♦ 106k

10

votes

3

answers

7k

views

Why hash or salt when signing? [duplicate]

hash rsa signature salt

modified yesterday ispiro 1,719

0

votes

0

answers

22

views

Hash Function with Same Output for Similar Data

hash

asked yesterday Alex 101

-1

votes

0

answers

29

views

How to find the secret of a hashing algorithm? [closed]

hash algorithm-design keys attack

asked yesterday 191020 1

0

votes

0

answers

17

views

How to make Lagged Fibonacci generator fail birthday test in Testu01

random-number-generator pseudo-random-generator statistical-test

asked yesterday user8863554 33

1

vote

0

answers

11

views

Is it necessary to prove EUF-CMA security of blind signature based on one-more type assumption？

modified yesterday user77340 31

1

vote

1

answer

143

views

Security of RSA cryptosystem variant

rsa

modified yesterday Fractalic 1,140

0

votes

0

answers

17

views

Probability of finding a valid block when cryptocurrency mining

cryptocurrency

asked yesterday Hatifix90 1

2

votes

0

answers

38

views

Is AES-GCM-SIV with fixed IV deterministic authenticated encryption?

aes authenticated-encryption gcm siv

modified yesterday fgrieu♦ 106k

0

votes

0

answers

30

views

What is a quantifier in game-based definitions?

provable-security security-definition

modified yesterday Ay. 373

0

votes

0

answers

15

views

Pipelining of the extender in SHA256

sha-256

asked yesterday Elliot Solskjaer 23

0

votes

1

answer

40

views

Is there any way to save Email encrypted in Database and used as normal later?

encryption authenticated-encryption

modified yesterday fgrieu♦ 106k

14

votes

1

answer

1k

views

What issues are there while using Linux's /dev/urandom for generating cryptographic keys?

random-number-generator trng

modified yesterday A. Hersean 544

0

votes

0

answers

23

views

Block cipher exercise CTR, CBC and ECB [closed]

encryption decryption

yesterday

2

votes

1

answer

44

views

Why do we need multiple adversaries in a game-based definition?

security-definition

modified yesterday Mikero 7,346

5

votes

1

answer

117

views

Given a ciphertext $c$ and a public string, how do we check whether $c$ encrypts something that is roughly equal to the string without decryption?

zero-knowledge-proofs

modified yesterday Community♦ 1

0

votes

0

answers

22

views

What tools to use to figure our what the hash/encryption algorithm is?

hash

asked yesterday Vish 101

0

votes

0

answers

27

views

Text cipher option that can decrypt the same ciphertext to two DIFFERENT and DESIRED outputs given DIFFERENT keys (and/or alphabet)

encryption stream-cipher pen-and-paper affine-cipher

modified yesterday Lucian Viorel 1

-2

votes

0

answers

18

views

Another way to brute force values and store them in arrays [closed]

brute-force-attack

asked yesterday Dave Kent 19

2

votes

1

answer

39

views

Create a TOTP for machines using HMAC or AES

aes hmac one-time-password

modified yesterday fgrieu♦ 106k

0

votes

0

answers

34

views

Is CMC/EME mode invulnerable?

aes modes-of-operation

modified 2 days ago kelalaka 23.2k

1

vote

1

answer

355

views

All the affine points on the curve

elliptic-curves

modified 2 days ago kelalaka 23.2k

0

votes

0

answers

46

views

How does the entropy of $r$ influence the security of the one-time pad $F_k(r) \oplus m$?

one-time-pad pseudo-random-function entropy

modified 2 days ago Mark 3,248

16

votes

1

answer

4k

views

Duration for attacking Two-Key Triple-DES Encryption using all RAM ever built?

cryptanalysis des meet-in-the-middle-attack

modified 2 days ago fgrieu♦ 106k

1

vote

0

answers

23

views

Is there a universal construction for Davies-Meyer hash functions?

hash block-cipher collision-resistance pseudo-random-function pseudo-random-permutation

asked 2 days ago Keshav Srinivasan 97

0

votes

1

answer

72

views

Proof of (in)distinguishability based on DDH/CDH/DL

diffie-hellman discrete-logarithm distinguisher

modified 2 days ago Community♦ 1

4

votes

2

answers

554

views

Why Random Secret Necessary Almost in all digital Signature Algorithms

signature

modified 2 days ago Daniel Silveira 1

1

vote

1

answer

82

views

Ensure Data Integrity In An ECDH Key Excange

elliptic-curves key-exchange integrity

modified 2 days ago Community♦ 1

0

votes

0

answers

30

views

Advice on software to be used

decryption

asked 2 days ago yannis 101

0

votes

0

answers

40

views

hash compression rates

hash compression information-theory

modified 2 days ago Jorge Alberto Medina Rosas 1

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