Cryptography Stack Exchange

1

vote

0

answers

6

views

How many bits are needed to commit one bit non-interactively in the standard model?

commitments

modified 6 mins ago CryptoLover 382

0

votes

2

answers

17

views

AES_256_ENCRYPT_CTR(key, sha-1(plainText)+plainText) VS AES-GCM, which is more secure?

aes collision-resistance

modified 2 hours ago Shan Chen 1,120

4

votes

2

answers

491

views

Is semantic security important in a hybrid cryptosystem?

rsa padding semantic-security

modified 3 hours ago forest 2,447

1

vote

1

answer

39

views

Disadvantage of the using a counter within plain text for encrypting with AES256 and authentication?

aes authentication authenticated-encryption

modified 3 hours ago Nayan Karan 6

0

votes

1

answer

20

views

Is this MAC correct and secure?

mac pseudo-random-generator pseudo-random-function xor

answered 3 hours ago satya 311

0

votes

1

answer

57

views

Zero knowledge proof in smart parking managment systems

zero-knowledge-proofs data-privacy

modified 7 hours ago Community♦ 1

0

votes

0

answers

60

views

RSA restore part of D from E and N

rsa

modified 9 hours ago kelalaka 4,534

1

vote

1

answer

29

views

AES decryption of MixColumn

aes

modified 9 hours ago kelalaka 4,534

9

votes

2

answers

1k

views

How reassuring is 64-bit (in)security?

hash sha-1 complexity

modified 9 hours ago kelalaka 4,534

5

votes

1

answer

228

views

Is a transposition cipher categorized as asymmetric algorithm?

public-key

modified 9 hours ago Anders 184

8

votes

4

answers

767

views

Why is SHA-512 limited to an input of $2^{128}$ bits?

hash sha-512

modified 9 hours ago kelalaka 4,534

2

votes

1

answer

45

views

Proof of membership in an aggregated BLS signature

accumulators bls-signature

modified 9 hours ago irakliy 139

1

vote

1

answer

39

views

Can a message be encrypted with BOTH mono-alpha and poly-alpha ciphers?

symmetric classical-cipher substitution-cipher transposition-cipher

modified 9 hours ago Ella Rose 14.6k

0

votes

1

answer

46

views

What risks are involved when choosing a curve for an implementation of ECC?

elliptic-curves backdoors

answered 11 hours ago AleksanderRas 1,592

2

votes

1

answer

91

views

Explaining Chaotic Cryptography

encryption cryptanalysis symmetric

modified 11 hours ago Ella Rose 14.6k

0

votes

1

answer

25

views

DSA: How to calculate 224-bit $q$ for 2048-bit $p$

dsa prime-numbers

answered 11 hours ago poncho 88.9k

2

votes

1

answer

47

views

Is PRG On Concatenation of Input a PRG

pseudo-random-generator

modified 13 hours ago Ungoliant 31

0

votes

1

answer

39

views

How to apply IV and tag to protect messages encrypted using AES-GCM?

aes aes-gcm

modified 13 hours ago Maarten Bodewes 52.1k

1

vote

0

answers

31

views

El Gamal Signatures, Need help explanining a step, Where does the “775” come from? Image included

encryption

modified 13 hours ago J. Doe Hue 6

-1

votes

2

answers

78

views

Determining whether functions are one-way or not

one-way-function complexity

modified 14 hours ago Maeher 3,162

1

vote

0

answers

19

views

If F is a PRP then the tweakable block-cipher based on the Merkle-Damgard construction is a secure TBC

pseudo-random-permutation merkle-damgaard tweakable-cipher

asked 15 hours ago Javier 523

0

votes

1

answer

22

views

modular reduction algorithm over $F_{2^m}$ doesn't seem to work when order of polynomial being reduced is small

finite-field gcm

answered 16 hours ago poncho 88.9k

1

vote

3

answers

112

views

What is the largest key size that could be carried by a shuffled deck of playing cards?

key-size pen-and-paper

answered 16 hours ago fgrieu 77.2k

1

vote

1

answer

59

views

Can wiping a disk writing zeros on an encrypted device be a weak point?

disk-encryption

answered 21 hours ago forest 2,447

-1

votes

1

answer

30

views

Why is the Rabin mapping not a permutation over $\mathbb{Z}_N^*$

rabin-cryptosystem

answered 22 hours ago poncho 88.9k

0

votes

0

answers

41

views

Computational Complexity of SHA-3 (SHAKE128)

encryption hash sha-3

asked 22 hours ago Al-Ani 35

2

votes

1

answer

55

views

Calculate new hash from old hash + appended string

hash sha-512

modified 23 hours ago Maeher 3,162

2

votes

4

answers

151

views

Is it possible to verify and relay an encryption key with a trusted but transparent third party?

zero-knowledge-proofs verifiability

modified yesterday Community♦ 1

7

votes

1

answer

73

views

WOTS+: Why does it XOR before running data through the hash function?

implementation post-quantum-cryptography

modified yesterday Mikero 5,292

0

votes

1

answer

53

views

Mathematics behind the paper “how to leak a secret” for ring signature

modified yesterday Shan Chen 1,120

0

votes

0

answers

23

views

Efficient accumulator with constant witnesses

accumulators

modified yesterday irakliy 139

1

vote

1

answer

40

views

Use partial hash to verify entire hash

hash sha-256 hash-signature

modified yesterday kelalaka 4,534

1

vote

2

answers

46

views

How is Diffie Helman secure when the exchanged number is a power of the generator less than the modulo

diffie-hellman

modified yesterday Shan Chen 1,120

1

vote

1

answer

35

views

Permutation and modes of operation

stream-cipher modes-of-operation permutation

modified yesterday kodlu 8,286

2

votes

2

answers

662

views

CBC-MAC insecure with random IV

mac cbc cbc-mac

modified yesterday Maeher 3,162

-3

votes

0

answers

31

views

Anyone here who can help me to solve these questions? [duplicate]

encryption

asked yesterday Maria 1

0

votes

0

answers

21

views

how can i decrypt enigma plugboard in python

enigma

asked yesterday Fraxn 1

0

votes

0

answers

16

views

can't decrypt AES-256-GCM log file! [HELP] [on hold]

aes tls gcm

asked yesterday Fraxn 1

-1

votes

0

answers

34

views

What is the key to these encrypted messages? [on hold]

encryption keys

asked yesterday Terry Gould 99

2

votes

2

answers

36

views

Does side-channel attacks offer any difficulty to Stinson's concept of `provable security'?

provable-security side-channel-attack

modified yesterday kelalaka 4,534

0

votes

0

answers

16

views

Is this still considered to be differentially private?

differential-privacy

asked yesterday L. Lei 1

6

votes

2

answers

300

views

Perfect Steganography

steganography

modified yesterday DrPhill 36

1

vote

1

answer

44

views

Authentication protocol for communication with Arduino Uno

elliptic-curves protocol-design authentication

modified yesterday Gilles 7,477

0

votes

1

answer

67

views

Is the hash function $h(x\|y) = AES_x( y)$ collision resistant?

hash aes cryptanalysis collision-resistance

modified yesterday Gilles 7,477

5

votes

0

answers

39

views

Why would the use of Curve25519 in Dragonfly leak information?

elliptic-curves key-exchange pake

asked yesterday forest 2,447

2

votes

1

answer

253

views

SSL - encrypt with private key and then with public key?

public-key tls openssl

modified 2 days ago Ella Rose 14.6k

1

vote

2

answers

41

views

How to calculate a multiple-character checksum for authentication using a tabula recta?

authentication

modified 2 days ago Community♦ 1

Top Questions

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