Thomas's user avatar
Thomas's user avatar
Thomas's user avatar
Thomas
  • Member for 12 years, 2 months
  • Last seen this week
  • Wellington, New Zealand
58 votes
Accepted

Why is it important that phi(n) is kept a secret, in RSA?

43 votes
Accepted

Calculating RSA private exponent when given public exponent and the modulus factors using extended Euclid

37 votes
Accepted

Low Public Exponent Attack for RSA

33 votes
Accepted

Did a certain cryptography method get abandoned due to security flaws in the past?

32 votes
Accepted

Why can't I reverse a hash to a possible input?

31 votes
Accepted

The difference between these 4 breaking Cipher techniques?

20 votes

Is there a hash function which has no collisions?

20 votes
Accepted

Why RSA can't handle numbers above 76?

15 votes

Significance of 3mod4 in squares and square roots mod n?

14 votes
Accepted

Why are these specific values used to initialise the hash buffer in SHA-512?

13 votes
Accepted

Would this simple encrypted chat program be feasible using One Time Pads?

11 votes

How and why can a decryption program tell me that a key is incorrect?

11 votes

Is it possible to make time-locked encrytion algorithm?

11 votes

Theoretical attack on RSA

11 votes

Using CBC with a fixed IV and a random first plaintext block

9 votes
Accepted

Exactly two of the four roots must be greater than N/2

9 votes

How does Clifford Cocks 'Non-Secret Encryption' work?

9 votes
Accepted

Can the encryption exponent e be greater than ϕ(N)?

9 votes
Accepted

Does a playlist of songs or movies mixed together contain enough random enough for OTP key material?

8 votes
Accepted

RSA smaller number work-out-by-hand not working - I think I made a mistake

8 votes

How to best obtain bit sequences from throwing normal dice?

7 votes
Accepted

RSA Key generation Public exponent too big

7 votes

Is it safe to use RSA as a proof-of-work system?

7 votes
Accepted

Are there any simple and yet secure encryption algorithms?

7 votes

What algorithm could/should be used to encrypt files for storage on untrusted servers?

7 votes

Capacity of Advanced Encryption Standard in terms of File Encryption

6 votes

Which is more secure using a CSPRNG for a One-time pad, or AES?

6 votes

Why do we need Hash by key?

6 votes
Accepted

Encrypt a single file, chunk-by-chunk, each chunk using different key (AES)

6 votes

How does DES decryption work? Is it the same as encryption or the reverse?