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18 Questions

Votes Activity Newest Views
10
45
votes
1
answer
6k
views

What is a “freestart collision”?

hash cryptanalysis collision-resistance terminology
Feb 23 '17 at 21:02 Community♦ 1
5
15
votes
3
answers
948
views

Does a partial preimage attack imply a preimage attack?

hash preimage-resistance
Apr 10 '19 at 21:29 Maarten Bodewes♦ 77.3k
4
9
votes
1
answer
351
views

Why is the whole initial state used in the final addition of Salsa20 and ChaCha?

algorithm-design salsa20 chacha
Jul 26 '15 at 10:42 Community♦ 1
 
8
votes
1
answer
338
views

How many degrees of freedom up my sleeve?

algorithm-design constants
Aug 9 '14 at 17:52 Community♦ 1
 
7
votes
1
answer
902
views

Where is CFB-MAC defined?

block-cipher reference-request mac modes-of-operation cfb
Feb 11 '16 at 15:50 Community♦ 1
1
7
votes
1
answer
269
views

How can one detect if a hash function doesn't have a full image?

hash collision-resistance
Jun 9 '14 at 23:58 D.W. 34.5k
1
6
votes
1
answer
529
views

Fast 128-bit MAC with second preimage resistance?

authentication mac 2nd-preimage-resistance
Sep 10 '15 at 14:48 Yehuda Lindell 24.9k
1
6
votes
1
answer
1k
views

What weaknesses in Hash_DRBG did NIST find and fix?

hash random-number-generator pseudo-random-generator standards
Sep 23 '14 at 14:17 otus 30.5k
 
5
votes
1
answer
667
views

Equivalent security of KMAC and different HMAC instances?

hmac mac sha-3 kmac
Aug 10 '16 at 19:01 Luis Casillas 13.4k
 
5
votes
1
answer
1k
views

How does the HOTP dynamic truncation function generalize to longer hashes?

hmac reference-request sha-256 sha-512 hotp
Sep 14 '15 at 9:58 Community♦ 1
1
5
votes
2
answers
4k
views

Is there a standard way to use a nonce with HMAC?

hash hmac reference-request standards nonce
Jun 30 '14 at 15:28 Maarten Bodewes♦ 77.3k
 
4
votes
1
answer
195
views

Is there a way to slow down collision attacks using iteration?

hash algorithm-design collision-resistance brute-force-attack
Oct 6 '16 at 11:51 tylo 11.7k
 
4
votes
0
answers
466
views

Can convergent encryption be turned into deterministic authenticated encryption with HMAC?

algorithm-design authenticated-encryption deterministic-encryption convergent-encryption
Aug 12 '15 at 9:20 otus 30.5k
 
4
votes
1
answer
581
views

Parallelization of CFB mode encryption and decryption

implementation modes-of-operation cfb
Jul 9 '15 at 14:20 cygnusv 4,627
 
2
votes
1
answer
760
views

Can the key-complement property of DES be used against 3DES?

keys des 3des meet-in-the-middle-attack
Apr 27 '16 at 15:42 Community♦ 1
 
2
votes
1
answer
622
views

Is MAC-then-encrypt with stream ciphers secure?

mac stream-cipher authenticated-encryption forgery
Jul 24 '14 at 15:57 Community♦ 1
1
2
votes
2
answers
514
views

Password-based encrypted key storage?

encryption aes keys pbkdf-2 standards
Jul 7 '14 at 23:30 D.W. 34.5k
 
1
vote
1
answer
198
views

Ed25519 with R replaced by H(RAM)?

signature ed25519
May 20 '14 at 2:16 Community♦ 1
Cryptography
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