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
awarded  Organizer
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
22
answered Random vs. Fixed Paddings
Sep
18
awarded  Custodian
Sep
18
reviewed Excellent Elliptic Curve Cryptography
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.
Nov
10
awarded  Yearling
Aug
6
answered Why should I make my cipher public?
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
revised Is there an intuitive explanation as to why only the private key can decrypt a message encrypted with the public key?
Corrected spelling
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
29
revised Is there an intuitive explanation as to why only the private key can decrypt a message encrypted with the public key?
Changed formulas to adhere the typical notation
Jul
29
answered Is there an intuitive explanation as to why only the private key can decrypt a message encrypted with the public key?
Jul
26
reviewed No Action Needed split up sha256 hash and compare indiv block results
Jul
26
reviewed No Action Needed Is truncating a SHA512 hash to the first 160 bits as secure as using SHA1?
Jul
18
reviewed No Action Needed Why is asymmetric encryption IND-CPA?
Jul
18
awarded  Critic
Jul
3
reviewed No Action Needed How to find generator $g$ in a cyclic group?
Jul
1
reviewed No Action Needed Prove that textbook RSA is susceptible to a chosen ciphertext attack
Jul
1
reviewed No Action Needed RSA by hand - did I do something wrong? (c = m on encryption)