User B-Con

59 votes

Accepted

What are the advantages of TOTP over HOTP?

answered Mar 30, 2012 at 1:20

36 votes

How secure is AES-256?

answered Apr 1, 2012 at 21:00

27 votes

What is the meaning of "trapdoor" in cryptography?

answered Aug 30, 2013 at 21:14

17 votes

Accepted

Does the GCM authentication tag need to be protected?

answered Jul 29, 2013 at 15:18

17 votes

Accepted

Generating Random Primes

answered May 3, 2012 at 20:28

17 votes

Accepted

Why do block ciphers need a non-linear component (like an S-box)?

answered Jun 7, 2012 at 0:26

16 votes

Accepted

Different implementations of SHA1, which one is correct?

answered Jul 13, 2012 at 15:06

15 votes

Is it possible to pick your Ed25519 public key?

answered Aug 22, 2012 at 22:14

14 votes

Encrypt a file once with 50 characters password or twice with 25 characters?

answered May 31, 2013 at 19:15

14 votes

Why is AES not a Feistel cipher?

answered Sep 28, 2013 at 22:28

13 votes

Accepted

How can disk encryption systems (like Truecrypt) resist frequency analysis when they allow random access?

answered May 8, 2012 at 5:52

11 votes

Accepted

How does the secret key in an HMAC prevent modification of the HMAC?

answered Jan 1, 2014 at 22:45

10 votes

Which crypto libraries/programs do we have the most confidence in?

answered Oct 26, 2013 at 22:50

10 votes

Practical necessity of semantic security under chosen plain text attack (CPA) in CBC mode

answered May 1, 2012 at 23:44

10 votes

Accepted

Why x00 is usually avoided in salt?

answered Jul 31, 2012 at 16:25

9 votes

Accepted

Homomorphic cryptosystems in RSA

answered Aug 14, 2012 at 17:25

9 votes

Accepted

Encrypting 8 times with 8-bit key beneficial?

answered Sep 18, 2013 at 7:20

9 votes

Accepted

Does AES with whitening mode have the following property?

answered Mar 29, 2012 at 20:36

9 votes

Is SHA-256 secure as a CTR block cipher?

answered Jun 22, 2012 at 16:33

8 votes

Accepted

Questions about Key Derivation Functions

answered Apr 25, 2012 at 18:39

8 votes

Accepted

Encryption algorithm that produces dummy output on incorrect passwords

answered Apr 4, 2012 at 19:22

8 votes

Accepted

Advantage of AES(Rijndael) over Twofish and Serpent

answered Nov 7, 2012 at 20:51

8 votes

Why is sharing the seed and using SecureRandom "deterministically" so bad?

answered Oct 24, 2013 at 20:22

7 votes

Accepted

Are there any papers explaining how to port textbook RSA to realworld RSA?

answered Jul 18, 2012 at 4:50

7 votes

Accepted

Generating a cryptographically secure, many-time use, symmetric encryption key

answered Jul 23, 2012 at 20:25

7 votes

Can you make a hash out of a stream cipher?

answered Mar 29, 2012 at 15:35

6 votes

Crypto-Compression Algorithms?

answered Apr 5, 2012 at 18:29

6 votes

Is there a hash algorithm that is slow to calculate but relatively fast to check?

answered Apr 10, 2012 at 0:28

6 votes

Accepted

Which attacks can be avoided by the use of OFB instead of ECB?

answered May 3, 2012 at 19:44

6 votes

Is it possible to make time-locked encrytion algorithm?

answered Jun 26, 2012 at 22:05

Stack Exchange Network

78 Answers

What are the advantages of TOTP over HOTP?

How secure is AES-256?

What is the meaning of "trapdoor" in cryptography?

Does the GCM authentication tag need to be protected?

Generating Random Primes

Why do block ciphers need a non-linear component (like an S-box)?

Different implementations of SHA1, which one is correct?

Is it possible to pick your Ed25519 public key?

Encrypt a file once with 50 characters password or twice with 25 characters?

Why is AES not a Feistel cipher?

How can disk encryption systems (like Truecrypt) resist frequency analysis when they allow random access?

How does the secret key in an HMAC prevent modification of the HMAC?

Which crypto libraries/programs do we have the most confidence in?

Practical necessity of semantic security under chosen plain text attack (CPA) in CBC mode

Why x00 is usually avoided in salt?

Homomorphic cryptosystems in RSA

Encrypting 8 times with 8-bit key beneficial?

Does AES with whitening mode have the following property?

Is SHA-256 secure as a CTR block cipher?

Questions about Key Derivation Functions

Encryption algorithm that produces dummy output on incorrect passwords

Advantage of AES(Rijndael) over Twofish and Serpent

Why is sharing the seed and using SecureRandom "deterministically" so bad?

Are there any papers explaining how to port textbook RSA to realworld RSA?

Generating a cryptographically secure, many-time use, symmetric encryption key

Can you make a hash out of a stream cipher?

Crypto-Compression Algorithms?

Is there a hash algorithm that is slow to calculate but relatively fast to check?

Which attacks can be avoided by the use of OFB instead of ECB?

Is it possible to make time-locked encrytion algorithm?