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cpast
  • Member for 7 years, 9 months
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22 votes

Is the one-time-pad a secure system according to modern definitions?

15 votes
Accepted

What is the purpose of pre master secret in SSL/TLS?

15 votes

What is the difference between CSPRNG and PRNG?

14 votes
Accepted

Logjam: "composite order subgroups" explained for TLS developers and system admins?

13 votes

How bad it is using the same IV twice with AES/GCM?

13 votes

How will Cryptography be changed by Quantum Computing?

12 votes
Accepted

Are there cryptographic hash functions which do not have any collisions?

8 votes

Difference between Hash function and Random Oracle

8 votes

OTP - Reuse key BUT add IV, is it secure enough?

6 votes

Toy public/private key example open to frequency analysis?

6 votes

chaining multiple key derivation functions together

6 votes
Accepted

How does ECDHE_RSA key exchange mechanism work?

6 votes

What does a stream cipher provide that cannot be obtained with AES CTR mode operation?

5 votes
Accepted

What does “invertibility of the cryptographic primitive” mean?

5 votes

Encryption of exe file

5 votes
Accepted

Is this transposition cipher information-theoretically secure for 1 message?

5 votes
Accepted

Are there any quantum-resistant symmetric encryption schemes?

5 votes

Is RSA with SHA1 broken?

5 votes
Accepted

Key Length vs KeySpace

5 votes
Accepted

Defence against timing attacks

5 votes
Accepted

Why are twofish or other algorithms not NIST approved, are they still safe?

5 votes
Accepted

ECDSA for encryption

4 votes

Why does consecutive permutations or consecutive substitutions not enhance security?

4 votes

AES GCM vs other encryption modes in embedded environment for network traffic

4 votes
Accepted

Is changing $H(R\mathbin{\Vert}A\mathbin{\Vert}M)$ to $H(R\mathbin{\Vert}A\mathbin{\Vert}H(M))$ in EdDSA secure?

4 votes
Accepted

Check if this cryptosystem is safe

4 votes

How to encypt/decrypt messages after ECDH key agreement

4 votes

New to cryptology, studying Message Authentication Codes

4 votes

What should I think about these unique certificate serial numbers

4 votes

Can AES be considered as Perfectly Secure?