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Patriot
  • Member for 4 years, 6 months
  • Last seen more than a month ago
  • Far East
406 votes
13 answers
163k views

Should we MAC-then-encrypt or encrypt-then-MAC?

224 votes
2 answers
121k views

What are the differences between a digital signature, a MAC and a hash?

  • 2,538
173 votes
4 answers
118k views

Why is elliptic curve cryptography not widely used, compared to RSA?

  • 1,915
162 votes
2 answers
159k views

What is the main difference between a key, an IV and a nonce?

  • 5,932
159 votes
4 answers
51k views

Should we trust the NIST-recommended ECC parameters?

  • 35.5k
114 votes
4 answers
75k views

How should I calculate the entropy of a password?

  • 1,887
94 votes
1 answer
148k views

What is the difference between PKCS#5 padding and PKCS#7 padding

  • 85.9k
93 votes
2 answers
24k views

What is the "Random Oracle Model" and why is it controversial?

  • 4,008
91 votes
4 answers
42k views

Does Schnorr's 2021 factoring method show that the RSA cryptosystem is not secure?

  • 1,532
89 votes
2 answers
161k views

What is the difference between CBC and GCM mode?

  • 1,243
86 votes
10 answers
17k views

In end-to-end encryption, doesn't the server need to be trusted?

  • 979
84 votes
5 answers
274k views

How secure is AES-256?

  • 1,025
83 votes
9 answers
132k views

Should I use ECB or CBC encryption mode for my block cipher?

  • 1,141
78 votes
5 answers
36k views

How are primes generated for RSA?

  • 1,095
77 votes
8 answers
9k views

Layman's explanation of encryption backdoors

68 votes
4 answers
13k views

Why does the FBI ask Apple for help to decrypt an iPhone?

  • 1,315
61 votes
6 answers
9k views

Soft question: Examples where lack of mathematical rigour cause security breaches?

  • 1,297
58 votes
3 answers
48k views

Definition of textbook RSA

  • 1,903
58 votes
4 answers
124k views

Difference between stream cipher and block cipher

57 votes
8 answers
59k views

How does asymmetric encryption work?

56 votes
2 answers
11k views

Is the software that uses PGP broken, or is it PGP itself?

  • 17.4k
53 votes
5 answers
95k views

What are the chances that AES-256 encryption is cracked?

53 votes
6 answers
11k views

Kerckhoffs’ principles – Why should I make my cipher public?

  • 2,526
53 votes
7 answers
11k views

One Encryption, Many Decryption Keys

52 votes
2 answers
38k views

Why use an Initialization Vector (IV)?

48 votes
8 answers
30k views

Is there a simple hash function that one can compute without a computer?

  • 583
42 votes
3 answers
20k views

Why does nobody use (or break) the Camellia Cipher?

  • 1,172
42 votes
4 answers
15k views

Cryptography algorithms that take longer to solve on a GPU than a CPU

  • 429
41 votes
5 answers
9k views

In RSA, how does the CPU deal with this huge modulus (8192 bits)?

41 votes
6 answers
20k views

Does RSA work for any message M?

  • 37.8k
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