Cryptography Stack Exchange

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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

modified 27 mins ago caveman 219

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1

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88

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Can a message and one time pad each encrypted with separate ciphers be weaker than the stronger of either cipher?

encryption symmetric one-time-pad

modified 41 mins ago Community♦ 1

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0

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Is It Possible To Predict Random Numbers Generated From Java's Random PRNG

random-number-generator

modified 1 hour ago javaproblem201 11

25

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4

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5k

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What makes Quantum Cryptography secure?

key-exchange key-distribution quantum-key-distribution

modified 2 hours ago fgrieu♦ 106k

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14

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how to efficiently compute private key in DSA with known parameters

dsa

modified 3 hours ago kelalaka 24.4k

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24

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Practicality of a certain hash function

hash collision-resistance provable-security

modified 3 hours ago kelalaka 24.4k

2

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0

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32

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Determination of the key rate of BBM92 Quantum Key Distribution (numerically)

quantum-key-distribution

modified 4 hours ago fgrieu♦ 106k

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1

answer

30

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Has anyone implemented the BB84 protocol?

quantum-key-distribution

modified 4 hours ago fgrieu♦ 106k

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1

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68

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Help with linear approximation of DES(I don't understand some part of it )

cryptanalysis des linear-cryptanalysis

modified 4 hours ago user738585 13

7

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1

answer

203

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In RSA, given public key $(n,e)$ and $d^e\bmod n$, can we factor $n$?

rsa

answered 6 hours ago mehdi mahdavi oliaiy 21

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0

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11

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Will it be a bad idea to replace unsigned public key with signed public key in x3dh protocol?

signature diffie-hellman protocol-design key-exchange signal-protocol

modified 9 hours ago Hern 61

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1

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Why “encipher” instead of “encrypt” and “decipher” instead of “decrypt”?

encryption decryption

answered 11 hours ago kelalaka 24.4k

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0

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25

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Encrypting data with two separate keys

encryption aes

modified 16 hours ago Allan Pinkerton 131

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If there is an algorithm $A$ of size $T$ that guesses the MSB of an encryption with probability of $0.6$, then the encryption is not $(T, 0.1)$-secure

encryption cryptanalysis security-definition

modified 16 hours ago Gabi G 111

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

Can a message and one time pad each encrypted with separate ciphers be weaker than the stronger of either cipher?

Is It Possible To Predict Random Numbers Generated From Java's Random PRNG

What makes Quantum Cryptography secure?

how to efficiently compute private key in DSA with known parameters

Practicality of a certain hash function

Determination of the key rate of BBM92 Quantum Key Distribution (numerically)

Has anyone implemented the BB84 protocol?

Help with linear approximation of DES(I don't understand some part of it )

In RSA, given public key $(n,e)$ and $d^e\bmod n$, can we factor $n$?

Will it be a bad idea to replace unsigned public key with signed public key in x3dh protocol?

Why “encipher” instead of “encrypt” and “decipher” instead of “decrypt”?

Encrypting data with two separate keys

If there is an algorithm $A$ of size $T$ that guesses the MSB of an encryption with probability of $0.6$, then the encryption is not $(T, 0.1)$-secure

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