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2 votes
1 answer
118 views

How do different types of ciphers relate to each other?

1 vote
0 answers
72 views

How to solve the problem of FHE ciphertext expansion?

1 vote
1 answer
333 views

Substitution-Permutation Network (SPN) Example

2 votes
1 answer
74 views

Is the XOR two block ciphers still a block cipher?

-1 votes
1 answer
35 views

How is DES used with CBC?

0 votes
1 answer
42 views

Use same key k in deterministic counter mode to encrypt two different plaintext

1 vote
1 answer
109 views

What exactly is a "pass" when talking about hashing, ciphers and MAC algorithms?

2 votes
1 answer
125 views

Why do we need nonce in the CTR mode given that Deterministic counter mode is semantically secure?

1 vote
0 answers
46 views

By using a block cipher multiple times in a row is a 128-bit BC as secure as a 256-bit BC which uses his 128-key only as part of the message?

3 votes
4 answers
459 views

Increasing Block Length of Symmetric Cipher

2 votes
1 answer
64 views

Are there any significant ways in which TLS could still be improved?

0 votes
1 answer
67 views

Can attacker create encryption of message m XOR 1^n given the ciphertext c, in nonce-based counter mode?

1 vote
1 answer
40 views

Could Blowfish be extended to larger block/key sizes if increasing the level of sum and XOR operations?

0 votes
2 answers
99 views

Why GCM is used more often than CTR?

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