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Jan
28
answered How is the x coordinate of a “point at infinity” encoded in a Secp256k1 signature?
Jan
26
answered How to find an element of high-order in an RSA group?
Jan
23
answered In the Paillier cryptosystem, is there a method to judge whether an encrypted number is less than 0 (without the private key)
Jan
22
answered Does it take brute force to find a pair of plaintext and ciphertext that each follow a certain condition, given an AES encryption key?
Jan
21
answered Security for IV in AES-GCM mode
Jan
21
answered Why work in a subgroup QR(n) of an RSA group $Z^*_n$?
Jan
20
answered Finding a collision for a hash function
Jan
11
answered Is the One Time Pad (OTP) considered a cryptographic hash function?
Jan
9
answered How can we determine if two discrete logarithms are equal?
Jan
7
answered What happens if an RSA key pair has identical public and private exponents?
Jan
7
answered Using CBC with a fixed IV and a random first plaintext block
Jan
7
answered Break double encryption
Jan
7
answered Why can't I break ElGamal encryption by brute-forcing the secret exponent?
Jan
3
answered What's the strategy for future directions in cryptography? Bigger numbers/faster searching, or new methods, say, of factoring?
Jan
2
answered Hill cipher, unknown letter value
Dec
28
answered Can a nested block cipher avoid the meet in the middle attack by using a secret initialization vector for the inner encryption?
Dec
20
answered Why the following attack in common modulus RSA works?
Dec
19
answered How many bits of hash are realistically needed for key verification?
Dec
18
answered Can one build a one-way function from AES?
Dec
14
answered ANSI X9.31 standards for generating random numbers