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18 Questions

views newest activity votes

votes

answer

views

What is a “freestart collision”?

Feb 23 '17 at 21:02 ddddavidee 2,481

votes

answers

609

views

Does a partial preimage attack imply a preimage attack?

hash preimage-resistance

Nov 4 at 8:00 Community♦ 1

votes

answer

255

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

votes

answer

310

views

How many degrees of freedom up my sleeve?

algorithm-design constants

Aug 9 '14 at 17:52 Community♦ 1

votes

answer

616

views

Where is CFB-MAC defined?

block-cipher reference-request mac modes-of-operation cfb

Feb 11 '16 at 15:50 Community♦ 1

votes

answer

221

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. 29.3k

votes

answer

389

views

Equivalent security of KMAC and different HMAC instances?

hmac mac sha-3 kmac

Aug 10 '16 at 19:01 Luis Casillas 9,387

votes

answer

259

views

Fast 128-bit MAC with second preimage resistance?

authentication mac 2nd-preimage-resistance

Sep 10 '15 at 14:48 Yehuda Lindell 18.2k

votes

answers

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 52.1k

votes

answer

177

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 10.3k

votes

answers

401

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 27.8k

votes

answer

321

views

Parallelization of CFB mode encryption and decryption

implementation modes-of-operation cfb

Jul 9 '15 at 14:20 cygnusv 4,027

votes

answer

882

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 27.8k

votes

answer

328

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

votes

answer

717

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

votes

answer

400

views

Is MAC-then-encrypt with stream ciphers secure?

mac stream-cipher authenticated-encryption forgery

Jul 24 '14 at 15:57 Community♦ 1

votes

answers

405

views

Password-based encrypted key storage?

encryption aes keys pbkdf-2 standards

Jul 7 '14 at 23:30 D.W. 29.3k

vote

answer

169

views

Ed25519 with R replaced by H(RAM)?

signature ed25519

May 20 '14 at 2:16 Community♦ 1

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18 Questions

What is a “freestart collision”?

Does a partial preimage attack imply a preimage attack?

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

How many degrees of freedom up my sleeve?

Where is CFB-MAC defined?

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

Equivalent security of KMAC and different HMAC instances?

Fast 128-bit MAC with second preimage resistance?

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

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

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

Parallelization of CFB mode encryption and decryption

What weaknesses in Hash_DRBG did NIST find and fix?

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

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

Is MAC-then-encrypt with stream ciphers secure?

Password-based encrypted key storage?

Ed25519 with R replaced by H(RAM)?