Cryptography Stack Exchange

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4

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Secret community forming based on zero-knowledge proof (IOT)

modified 18 mins ago Curcuma_ 101

0

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0

answers

3

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XORing Algorithm Outputs To Guard Against Breakthroughs

hash mac multiple-encryption

asked 38 mins ago SamG101 497

1

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0

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23

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How large a product out of 3 close-by factors need to be to avoid factorization?

prime-numbers attack factoring safe-prime

modified 41 mins ago J. Doe 391

0

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0

answers

9

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find aes key in some messed up files [closed]

aes keys

asked 1 hour ago Alireza 1

0

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0

answers

12

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Why is Freedman-Nissim-Pinkas protocol not always correct?

private-set-intersection cca

asked 2 hours ago John Andreas 1

0

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0

answers

19

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BIP32 Extended Key to EC Private and Public Key Pair

elliptic-curves keys key-derivation passwords

modified 2 hours ago Maarten Bodewes♦ 66.3k

-1

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0

answers

30

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About the RSA with ASCII

rsa

modified 3 hours ago Maarten Bodewes♦ 66.3k

1

vote

1

answer

42

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In PKI, with a hash-encrypted message (first hashed, then encrypted), how is the plaintext ever retrieved?

encryption hash pki

modified 3 hours ago Maarten Bodewes♦ 66.3k

0

votes

2

answers

35

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Is a larger block size less secure against a brute-force known cipertext attack?

encryption block-cipher brute-force-attack

answered 4 hours ago Emme 1

0

votes

0

answers

17

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Which is faster, PRF based on AES-CTR and PRF based on BLAKE{2,3}?

pseudo-random-function

asked 7 hours ago user9414424 195

3

votes

1

answer

68

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Can a PRNG be made into a CSPRNG by hashing the outputs?

random-number-generator

modified 8 hours ago fgrieu 95.4k

3

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0

answers

29

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Distance between consecutive primes distribution

random-number-generator prime-numbers number-theory

asked 9 hours ago Meir Maor 7,089

3

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1

answer

155

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How does PUF hardware help in software activation?

license-key puf copy-protection

modified 10 hours ago Community♦ 1

1

vote

1

answer

41

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Cost model for different curve models

elliptic-curves finite-field

modified 11 hours ago Community♦ 1

1

vote

0

answers

23

views

How to play Mental Skull

protocol-design mental-poker

asked 12 hours ago Julian 111

0

votes

1

answer

31

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A modified question of Hazay & Lindell's Efficient Secure Two-Party protocols Book

protocol-design protocol-analysis paillier

modified 17 hours ago Mikero 6,506

4

votes

1

answer

106

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Reverse Java random seed using 81 calls to nextInt with a bound of 4?

cryptanalysis pseudo-random-generator

modified 17 hours ago fgrieu 95.4k

1

vote

1

answer

15

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Proof possession of private key in libsodium

public-key libsodium

answered 18 hours ago SamG101 497

2

votes

1

answer

4k

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How is HMAC hashed message decrypted on the receiver side

hash mac hmac

modified 20 hours ago user2736158 111

0

votes

2

answers

999

views

How can I convert numbers into prime numbers?

hash prime-numbers accumulators

modified 21 hours ago Maarten Bodewes♦ 66.3k

3

votes

1

answer

86

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Is the PCG PRNG a CSPRNG, or why not?

random-number-generator

modified 22 hours ago Maarten Bodewes♦ 66.3k

0

votes

0

answers

21

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Closest vector problem for given lattice with shortest vector

lattice-crypto

asked 23 hours ago GottlobtFrege 101

0

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0

answers

23

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Simulation-based proof in a particular scenario

protocol-design provable-security multiparty-computation

modified yesterday AmirHosein Adavoudi 399

2

votes

1

answer

110

views

Create a ciphertext that decrypt to different plaintexts with different keys in RSA

encryption rsa

modified yesterday fgrieu 95.4k

-2

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2

answers

33

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What is the difference between Symmetric authentication systems and Symmetric encryption systems? [closed]

encryption

modified yesterday SamG101 497

24

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1

answer

21k

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Is AES-256 a post-quantum secure cipher or not?

encryption aes block-cipher post-quantum-cryptography

modified yesterday kelalaka 15.8k

-1

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1

answer

21

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Parallelizabilty and prepocessing in Modes of operation (with example)

cbc modes-of-operation

answered yesterday fgrieu 95.4k

1

vote

1

answer

80

views

Simulator in semi-honest model in real/model paradigm

protocol-design

modified yesterday AmirHosein Adavoudi 399

3

votes

1

answer

177

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Relying on a private public key for authentication

public-key authentication authenticated-encryption

modified yesterday Max 225

0

votes

3

answers

100

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Why didn't people redesign the key scheduling algorithm of DES to use longer keys instead of using 3-DES?

block-cipher algorithm-design des 3des key-schedule

modified yesterday DannyNiu 2,756

0

votes

1

answer

66

views

PRNG XOR Pipeline

random-number-generator xor

modified yesterday Community♦ 1

1

vote

1

answer

19

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How RSA is implemented by authentication protocols?

authentication encryption jwt rsa

yesterday

2

votes

1

answer

211

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Hash function and Digital Encryption Algorithm

hash sha-256 cryptocurrency

modified yesterday Maarten Bodewes♦ 66.3k

2

votes

1

answer

131

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Bijection Between Real View and Simulated View

zero-knowledge-proofs

modified yesterday Community♦ 1

0

votes

0

answers

38

views

Is there any encryption system where the sender cannot prove that a specific ciphertext belongs to a specific plaintext

encryption public-key symmetric zero-knowledge-proofs deniable-encryption

modified yesterday Tanmoy Krishna Das 101

3

votes

1

answer

83

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Gentry-Halevi’s Fully-Homomorphic Encryption and hermite factor

homomorphic-encryption post-quantum-cryptography lattice-crypto

modified yesterday Community♦ 1

0

votes

0

answers

17

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Computing PGP ed25519 and curve25519 keygrips?

public-key keys pgp

asked yesterday skaht 121

-2

votes

0

answers

38

views

Difference of Hash function and Cryptographic Accumulator

hash collision-resistance accumulators

modified yesterday jhdm 1

1

vote

0

answers

21

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Simulation-based proof in the semi-honest model when a party is corrupted

provable-security protocol-analysis

modified 2 days ago AmirHosein Adavoudi 399

2

votes

1

answer

50

views

Faster Shuffling for a Simple Application

random-number-generator anonymity mental-poker

modified 2 days ago poncho 103k

1

vote

1

answer

43

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Choices of $q$ and $f$ for RLWE-based constructions

lattice-crypto ring-lwe

answered 2 days ago crytpocog 101

2

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1

answer

3k

views

How to create a PEM file for storing an RSA key?

rsa implementation standards file-format

modified 2 days ago HIGH0101 1

2

votes

1

answer

90

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Can Paillier ,RSA or any other schemes be used for universal re-encryption like elGamal?

rsa public-key elgamal-encryption paillier proxy-re-encryption

modified Jan 18 at 10:21 kelalaka 15.8k

1

vote

0

answers

309

views

Complexity of computing homomorphic encrypted matrix multiplication

homomorphic-encryption multiparty-computation matrix-multiplication

modified Jan 18 at 10:20 kelalaka 15.8k

1

vote

1

answer

45

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RSA signing - does EMSA-PKCS1-v1_5 padding need to be verified?

rsa signature padding pkcs1

modified Jan 18 at 9:29 fgrieu 95.4k

2

votes

2

answers

162

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Why is a proxy needed in proxy re-encryption?

encryption proxy-re-encryption

modified Jan 18 at 9:05 kelalaka 15.8k

0

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1

answer

93

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How to implement GSW13 using Helib or SEAL?

encryption homomorphic-encryption implementation

modified Jan 18 at 7:02 Community♦ 1

0

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0

answers

49

views

A Mechanism for An Endless One Time Pad: Vulnerabilities? [closed]

one-time-pad

asked Jan 18 at 4:20 Spencer 31

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