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A. Hersean
  • Member for 5 years, 6 months
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8 answers
219 votes
103k views
100 bookmarks
How much would it cost in U.S. dollars to brute-force a 256-bit key in a year?
6 answers
135 votes
96k views
96 bookmarks
Should we sign-then-encrypt, or encrypt-then-sign?
4 answers
113 votes
75k views
66 bookmarks
How should I calculate the entropy of a password?
10 answers
86 votes
17k views
44 bookmarks
In end-to-end encryption, doesn't the server need to be trusted?
1 answer
60 votes
27k views
48 bookmarks
Easy explanation of "IND-" security notions?
2 answers
54 votes
12k views
28 bookmarks
Timing attack and good coding practices
3 answers
54 votes
24k views
32 bookmarks
Why Curve25519 for encryption but Ed25519 for signatures?
4 answers
38 votes
7k views
6 bookmarks
After 20 years of AES, what are the retrospective changes that should have been made?
2 answers
35 votes
27k views
7 bookmarks
Is AES-256 a post-quantum secure cipher or not?
2 answers
34 votes
5k views
28 bookmarks
What are recommended, general strategies to start block-cipher design and/or analysis?
1 answer
34 votes
14k views
7 bookmarks
ECDSA, EdDSA and ed25519 relationship / compatibility
2 answers
30 votes
6k views
14 bookmarks
AES-GCM Disadvantage
4 answers
28 votes
5k views
8 bookmarks
Why is FIPS 140-2 compliance controversial?
1 answer
26 votes
6k views
18 bookmarks
Is a hash a zero-knowledge proof?
2 answers
24 votes
8k views
8 bookmarks
Elliptic curve ed25519 vs ed448 - Differences
1 answer
24 votes
16k views
12 bookmarks
What are the odds of collisions for a hash function with 256-bit output?
2 answers
18 votes
2k views
2 bookmarks
Why was the winner of the AES competition not a Feistel cipher?
3 answers
18 votes
3k views
4 bookmarks
UMAC: to what extent is it in use today?
2 answers
13 votes
9k views
8 bookmarks
How safe are Libsodium Crypto Boxes?
3 answers
13 votes
2k views
9 bookmarks
How are points on an elliptic curve discretized?
1 answer
13 votes
4k views
5 bookmarks
Security considerations on "expand 32-byte k"-magic number in the Salsa20 family of stream ciphers?
1 answer
11 votes
4k views
8 bookmarks
Relation between entropy and min-entropy
7 answers
10 votes
2k views
4 bookmarks
In search of a pedagogically simple example of asymmetric encryption routine?
2 answers
10 votes
413 views
3 bookmarks
What role plays Quantum Fourier Transformation in Shor's integer factorization algorithm?
1 answer
10 votes
4k views
6 bookmarks
Curve25519 over Ed25519 for key exchange? Why?
1 answer
10 votes
6k views
6 bookmarks
Description of signatures with message recovery (as in ISO/IEC 9796-2 and EMV Signatures)
2 answers
9 votes
821 views
2 bookmarks
What do NM-CPA and NM-CCA mean?
2 answers
7 votes
560 views
3 bookmarks
Why ECDSA has its form?
1 answer
6 votes
928 views
2 bookmarks
Is forward secrecy overhyped or necessary?
9 answers
6 votes
817 views
8 bookmarks
Soft question: What are examples of beautiful proofs in cryptography?