User Cryptographeur

28 votes

Simply put, what does “perfect secrecy” mean?

answered Apr 13, 2014 at 22:29

17 votes

Accepted

Is there a way to generate sound one-time pads out of public information?

answered Jan 6, 2014 at 15:22

11 votes

What is the difference between a 'cipher' and a 'mode of operation'?

answered Oct 18, 2013 at 10:36

10 votes

Accepted

Is there a proof for showing any cryptogram is crackable?

answered Nov 13, 2013 at 10:02

10 votes

Accepted

AES mixcolumn stage

answered Jan 13, 2014 at 0:04

9 votes

Accepted

What is the importance of the $r$ and $c$ values for the Sponge Construction?

answered Mar 18, 2014 at 18:13

9 votes

Difference between lightweight, online and low memory Authenticated Encryption schemes

answered Mar 27, 2014 at 11:23

9 votes

Accepted

SHA-256-based stream cipher

answered Apr 8, 2014 at 22:34

8 votes

Why do some block cipher modes of operation only use encryption while others use both encryption and decryption?

answered Apr 13, 2014 at 14:25

7 votes

Accepted

How Multiplication Table is generated for GF(2^2) field

answered Jan 9, 2014 at 11:25

7 votes

In what way is XXTEA really vulnerable?

answered Jan 19, 2014 at 18:09

7 votes

Accepted

Can insecure algorithms be combined to form a secure algorithm?

answered Dec 4, 2013 at 16:52

7 votes

Why should I use Authenticated Encryption instead of just encryption?

answered Dec 6, 2013 at 22:12

7 votes

Accepted

Does SpongeWrap (from the Keccak team) absorb ciphertext or plaintext?

answered Dec 9, 2013 at 11:10

6 votes

Accepted

Is a simple stream cipher "partially homomorphic" if no integrity check is applied?

answered Dec 4, 2013 at 14:49

6 votes

Accepted

ML/NN Cryptanalysis

answered Feb 15, 2014 at 11:01

6 votes

Accepted

Chance in cryptography

answered Jan 13, 2014 at 12:34

6 votes

Accepted

Back up an information as $n$ pieces and require exactly $n-1$ to recover it

answered May 2, 2014 at 15:56

5 votes

Accepted

How is padding oracle attack mitigated by encrypt-then-MAC?

answered May 23, 2014 at 9:21

5 votes

KCV and compatibility with block cipher modes of operation

answered Mar 14, 2014 at 15:02

5 votes

Accepted

Is it possible to split a large AES encrypted string and decrypt the parts one by one?

answered Dec 6, 2013 at 14:15

5 votes

Accepted

If I have the unencrypted text and the encrypted text, can I calculate the key?

answered Oct 31, 2013 at 10:50

5 votes

Accepted

Increasing number of rounds in AES

answered Oct 17, 2013 at 15:35

4 votes

Accepted

Can we decrypt in this order when the message is encrypted twice?

answered Oct 16, 2013 at 11:44

4 votes

Accepted

Can we build authenticated encryption using Feistel Networks?

answered Nov 18, 2013 at 14:01

4 votes

AES column mixing and S-Box confusion

answered Dec 11, 2013 at 8:35

4 votes

Accepted

Why encrypting with private and public keys produce the same result?

answered Jan 8, 2014 at 0:36

4 votes

Accepted

ASCII: weakness

answered Jan 30, 2014 at 12:52

4 votes

Prove that two MACs with incremendal PRF application are not secure

answered Feb 21, 2014 at 13:49

4 votes

$f : \mathbb{Z}_n \rightarrow \mathbb{Z}^\times_n$?

answered Feb 24, 2014 at 17:44

Stack Exchange Network

69 Answers

Simply put, what does “perfect secrecy” mean?

Is there a way to generate sound one-time pads out of public information?

What is the difference between a 'cipher' and a 'mode of operation'?

Is there a proof for showing any cryptogram is crackable?

AES mixcolumn stage

What is the importance of the $r$ and $c$ values for the Sponge Construction?

Difference between lightweight, online and low memory Authenticated Encryption schemes

SHA-256-based stream cipher

Why do some block cipher modes of operation only use encryption while others use both encryption and decryption?

How Multiplication Table is generated for GF(2^2) field

In what way is XXTEA really vulnerable?

Can insecure algorithms be combined to form a secure algorithm?

Why should I use Authenticated Encryption instead of just encryption?

Does SpongeWrap (from the Keccak team) absorb ciphertext or plaintext?

Is a simple stream cipher "partially homomorphic" if no integrity check is applied?

ML/NN Cryptanalysis

Chance in cryptography

Back up an information as $n$ pieces and require exactly $n-1$ to recover it

How is padding oracle attack mitigated by encrypt-then-MAC?

KCV and compatibility with block cipher modes of operation

Is it possible to split a large AES encrypted string and decrypt the parts one by one?

If I have the unencrypted text and the encrypted text, can I calculate the key?

Increasing number of rounds in AES

Can we decrypt in this order when the message is encrypted twice?

Can we build authenticated encryption using Feistel Networks?

AES column mixing and S-Box confusion

Why encrypting with private and public keys produce the same result?

ASCII: weakness

Prove that two MACs with incremendal PRF application are not secure

$f : \mathbb{Z}_n \rightarrow \mathbb{Z}^\times_n$?