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Polynomial
  • Member for 12 years, 5 months
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39 votes
5 answers
23k views

Galois fields in cryptography

31 votes
3 answers
5k views

Is every output of a hash function possible?

31 votes
2 answers
6k views

Blum Blum Shub vs. AES-CTR or other CSPRNGs

24 votes
1 answer
16k views

In layman's terms, how does Shor's algorithm work?

23 votes
5 answers
9k views

Desirable S-box properties

15 votes
3 answers
5k views

Security of simple xor and s-box cipher?

14 votes
2 answers
11k views

Is PBKDF2-HMAC-SHA1 really broken?

9 votes
2 answers
3k views

Does data authenticity always, implicitly, provide data integrity?

9 votes
2 answers
1k views

Would a HMAC digest make sense in an RSA / ECDSA signature?

8 votes
2 answers
1k views

Hash decrypts key, key decrypts cipher... why?

8 votes
7 answers
7k views

Is a book cipher provably secure?

8 votes
4 answers
14k views

Is 512-bit RSA still safe for signature generation?

8 votes
1 answer
6k views

Padding methods for block ciphers - PKCS7 vs ANSI X.923

7 votes
3 answers
1k views

Order of cascaded ciphers

7 votes
1 answer
715 views

Memory-hard operations in work-factor hash functions

7 votes
1 answer
1k views

Why does anyone use elliptic curves for a CSPRNG?

6 votes
2 answers
1k views

Cryptanalysis and weaknesses of SEED cipher

5 votes
2 answers
388 views

Is a simple stream cipher "partially homomorphic" if no integrity check is applied?

5 votes
1 answer
1k views

Is it feasible to break Diffie-Hellman key exchange when the implementation uses a poor-quality PRNG?

5 votes
6 answers
501 views

Is it possible to ensure security with zero pre-shared information?

5 votes
2 answers
200 views

Authenticated encryption scheme for one-way radio telemetry

4 votes
2 answers
620 views

Is it possible to break a hash-based block cipher?

3 votes
1 answer
158 views

Potential vulnerability in DH key selection - am I understanding this right?

3 votes
1 answer
444 views

Galois field step in XEX mode

3 votes
1 answer
1k views

Given only RSA public key parameters, what security issues might I be able to detect?

3 votes
1 answer
479 views

What is the impact of a server not fully verifying the data in the Client Finished packet of a TLS connection?

3 votes
1 answer
210 views

What is PCT_SSL_CIPHER_TYPE_1ST_HALF?

3 votes
0 answers
294 views

Breaking an addition-based cipher with two ciphertexts but no known plaintext

3 votes
3 answers
900 views

Entropy of system data - use all and hash, or trim least significant bits?

3 votes
2 answers
1k views

What cipher mode is suitable for independantly decryptable short messages?