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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 Building a combined encryption scheme from two encryption schemes that's secure if at least on of them is secure
@Gordon While you can't delete this question, you can contact stackexchange asking to disassociate it from your account.
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
Jun
29
answered Double the key in block cipher - which approach is better?
Jun
29
comment Double the key in block cipher - which approach is better?
Xoring $k_2$ into both then plaintext and the ciphertext is better that xoring it only into one Even Mansour construction
Jun
29
revised Understanding elliptic curve encryption
added 39 characters in body; edited tags
Jun
29
comment Security of this deterministic encryption scheme
Implementing this scheme without a padding oracle isn't trivial, unless the MACed plaintext is already padded.
Jun
29
answered Adding tweak to a block cipher