Reputation
22,392
Next tag badge:
107/100 score
18/20 answers
Badges
4 31 80
Newest
 Yearling
Impact
~495k people reached

Feb
13
revised Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
package -> packet
Feb
13
comment Can one reduce the size of ECDSA-like signatures?
"the Prover commits to a random value $k$ and then proves that he knows $x/k$" - This is a nifty insight. Thank you! It seems like it can't be exactly correct: it doesn't seem like it's the Schnorr protocol adapted to prove knowledge of $x/k$, due to the presence of $h$. Intuitively I see why this reasoning makes a connection plausible, though. Is there any way to make this more formal/precise/accurate?
Feb
12
revised Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
added 359 characters in body; added 451 characters in body; added 239 characters in body
Feb
12
revised Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
added 1040 characters in body; added 66 characters in body
Feb
12
answered Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
Feb
12
answered Is semantic security important in a hybrid cryptosystem?
Feb
12
comment Is semantic security important in a hybrid cryptosystem?
You have two questions here: (a) is semantic security important, and (b) should we use PKCS #1 1.5 encryption? I suggest you might want to split off (b) into a separate question.
Feb
12
revised Why is OCB-AES mode not becoming a standard for authenticated encryption?
added 477 characters in body
Feb
11
answered PBKDF2 for key diversification
Feb
11
comment Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
It might help to have a more detailed specification of the situation. What compression algorithm was the data compressed with? DEFLATE? What does "I'm stuck with" mean? Do you have known plaintext? In other words, do you know the entire input to zlib? Part of the input? Do you know anything about the key, or is a uniformly random 64-bit value?
Feb
11
revised Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
deleted 1 characters in body; added 217 characters in body; edited tags
Feb
11
revised Is AES reducible to an NP-complete problem?
remove erroneous premises
Feb
11
answered Can the hash of one message be used to make it easier to find the hash of a very similar message?
Feb
10
reviewed Approve Request for 1024-bit primes $p$ , subgroup $q$ and subgroup generator $g$
Feb
10
reviewed Approve Request for 1024-bit primes $p$ , subgroup $q$ and subgroup generator $g$
Feb
10
comment How to bring little changes in DES algorithm
@JeffFerland, A request: I'd prefer that moderators not migrate bad questions; bad questions should be closed with feedback to the question-asker about how to improve them so they can be re-opened, rather than migrated to some other site to deal with. Crypto.SE has extensive policies on "homework" questions in its meta site, and this question doesn't meet any of those standards.
Feb
9
reviewed Needs Improvement Two step encryption
Feb
9
answered Two step encryption
Feb
9
comment Two step encryption
Please don't cross-post the same question on two StackExchange sites; that's discouraged. Please pick one to keep, and for the other, click the "flag" button to flag the moderator to ask them to close it.
Feb
9
reviewed Satisfactory Deriving Keys for Symmetric Encryption and Authentication