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mikeazo
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197 votes
Accepted

How much would it cost in U.S. dollars to brute-force a 256-bit key in a year?

73 votes
Accepted

Definition of textbook RSA

69 votes
Accepted

How are primes generated for RSA?

62 votes
Accepted

What is safer: ZipCrypto or AES-256?

52 votes
Accepted

How does hashing twice protect against birthday attacks?

39 votes
Accepted

Calculate all possible keys for AES 128 encryption to exploit hardware encryption

38 votes
Accepted

RSA encryption with private key and decryption with a public key

35 votes
Accepted

Which attacks are possible against raw/textbook RSA?

34 votes
Accepted

Differences between the terms "pre-master secret", "master secret", "private key", and "shared secret"?

33 votes
Accepted

Are there any known collisions for the SHA (1 & 2) family of hash functions?

32 votes

Isn't AES-NI useless because now the key length need to be longer?

29 votes
Accepted

Can someone explain the ECB Penguin?

28 votes

Why is $H(k\mathbin\Vert x)$ not a secure MAC construction?

27 votes
Accepted

How is the MD2 hash function S-table constructed from Pi?

26 votes
Accepted

Why do we need special key-wrap algorithms?

23 votes
Accepted

FIPS 140-2 Compliant Algorithms

21 votes
Accepted

Why does Signal repeatedly hash the secure passphrase?

21 votes
Accepted

RSA cracking: The same message is sent to two different people problem

21 votes
Accepted

how to use common modulus attack?

19 votes
Accepted

What exactly is bootstrapping in FHE?

19 votes
Accepted

Desirable S-box properties

18 votes
Accepted

Which public key cryptosystems are not based on number theory?

18 votes
Accepted

Authentication using AES

17 votes
Accepted

Salary Negotiation Problem

17 votes
Accepted

Would it be secure to use random numbers from random.org in a cryptographic solution?

17 votes
Accepted

Can two different pairs of RSA key have the same modulus?

16 votes

Why is a known-plaintext attack considered a complete break?

16 votes
Accepted

Is AES in CBC mode secure if a known and/or fixed IV is used?

16 votes
Accepted

Difference between computational and statistical indistinguishabilities

16 votes
Accepted

Isn't the structure of a potential plaintext of a ciphertext generated by a one-time pad dispositive, cryptanalysis-wise?

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