254 reputation
113
bio website blog.sw4j.de
location Bavaria, Germany
age 41
visits member for 1 year, 11 months
seen Sep 26 at 15:55

I'm a profesional software developer using Java (and a little bit of Scala).


Sep
22
comment Random vs. Fixed Paddings
@CodesInChaos I don't talk about randomness. If I pad a message with defined bytes then the attacker can try to decrypt the message and know that the decrypted text is right because of the padding...
Sep
8
comment Is there an intuitive explanation as to why only the private key can decrypt a message encrypted with the public key?
@rubo77 n is an arbitary chosen value. The concrete constraints for this value depends on the algorithm used.
Jul
30
comment Assuming a 1024qb quantum computer, how long to brute force 1024bit RSA, 256bit AES and 512bit SHA512
For 5: No, it will not take twice the time as a quantum computer must handle all at once and will not be able to be of any use in your case.
Jul
29
comment Is there an intuitive explanation as to why only the private key can decrypt a message encrypted with the public key?
@king_julien That's it. The difficulty to brute force the parts is the basic security of such algorithms. Also there is no inverse for $m^a \mod p$ which makes it difficult to brute force the algorithms.
Jul
1
comment Sending TLS messages with out encryption using openssl code
Do you mean cipher suite NONE?
Jun
20
comment Verify Signature Failed
Welcome to Cryptography. Please note that your question is off topic according to the on-topic list. You can ask such questions on StackOverflow but please show the code in the question.
Jun
10
comment Have these compositions of block ciphers the same security?
Can you please check your questions? I think the last one should read $DES_{k1}(DES_{k2}(.))$
Dec
11
comment What are the differences between a digital signature, a MAC and a hash?
@Flimm I only pointed out that this looks like homework. I did not cast any downvote and now I made an upvote because with this question it is of use for others also.
Dec
10
comment What are the differences between a digital signature, a MAC and a hash?
Looks like a homework ;)