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Jul
3
answered Does XTS provide random write access?
Jul
2
comment How often does RSA-OAEP have a leading zero?
@TBridges42 Depends on the most significant byte of the public key. The probability should be approximately p(MSB(ciphertext)=0) = 1/MSB(public key).
Jul
2
reviewed Reject Is One Time Pad something like this?
Jul
1
comment How often does RSA-OAEP have a leading zero?
If this is about the most significant byte of the ciphertext being zero, it's possible. Padding affects the plaintext.
Jul
1
reviewed No Action Needed Is this client-side password hash scheme secure?
Jul
1
reviewed Reviewed Is this client-side password hash scheme secure?
Jul
1
comment Is this client-side password hash scheme secure?
For code spanning several lines, I recommend indenting it with 4 spaces, instead of using a <code> html tag.
Jul
1
revised Is this client-side password hash scheme secure?
deleted 10 characters in body
Jul
1
awarded  Revival
Jul
1
reviewed No Action Needed Does authenticated encryption add any protection to a signed digital envelope?
Jul
1
reviewed No Action Needed ElGamal scheme attack when one message is known and ciphertexts are intercepted
Jul
1
comment How much computing resource is required to brute-force RSA?
Related question: How many RSA keys before a collision?
Jul
1
revised “123456” and “password” as crack standards
deleted 23 characters in body
Jun
30
awarded  Outspoken
Jun
30
comment Double the key in block cipher - which approach is better?
@nopenope If you look at the decryption operation $D^\prime_2$ instead of the decryption operation, you get the same formula as for for $E^\prime_1$, except that $c$ and $m$ are swapped. Since an attacker knows both $m$ and $c$, they don't care if they're attacking $E^\prime_1$ or $D^\prime_2$.
Jun
30
revised Double the key in block cipher - which approach is better?
added 197 characters in body
Jun
30
answered EdDSA Signature Algorithm - hash of secret key
Jun
30
comment Ideas for non duplicate cryptographically secure numbers
If 64 bit values are fine, you could encrypt a counteer using a 64 bit blockcipher, like blowfish or 3DES.
Jun
29
revised Double the key in block cipher - which approach is better?
added 121 characters in body
Jun
29
revised Double the key in block cipher - which approach is better?
added 121 characters in body