1,262 reputation
417
bio website
location Saarbrücken, Germany
age 26
visits member for 2 years, 6 months
seen yesterday

Jan
15
reviewed Reopen Java's SecureRandom & plaintext attack?
Jan
13
reviewed Leave Closed Authentication of machine before installation (to stop piracy)
Jan
13
reviewed Close Can a salt for a password hash be public?
Jan
13
reviewed Leave Open Is it possible to use structures other than finite fields?
Jan
8
reviewed Reject suggested edit on Many time pad attack
Dec
19
awarded  Custodian
Dec
19
reviewed Close Differential Cryptanalysis of FEAL-4
Dec
19
reviewed Close Are there any systems like SDSI / SPKI that are currently being developed?
Dec
17
reviewed No Action Needed Diffie-Hellman on additive group
Dec
2
comment What is the difference between, and security of $Z_p$ and $F_p$?
If $p$ is prime (and not 2 or 3), then $p-1$ is even and not equals to 2 and therefore cannot be prime.
Nov
26
revised How can Shamir's method for secret sharing work in the GF(256)?
edited body
Nov
22
comment Creating a secure key
In general, hashing (i.e. applying a collision resistant hash-function) is of course not a secure way to generate a key. However, our practical hash-functions are often assumed to be suitable for such tasks.
Nov
15
comment order between adversaries and type of resources given
From my experience CCA definitions that do not allow encryption queries are extremely uncommon. So a better way of putting that might be "Yes, unless you are using an uncommon definition of CCA that does not allow encryption queries."
Nov
10
comment Why don't we use MACs to store passwords?
I would like to add, that of course a MAC is generally no well suited for this task, because its common security definitions in no way guarantee any confidentiality. I.e. a MAC can be secure but leak the message, which makes this entire thing pointless. So for this to even make sense you would have require more than just a secure MAC. Some specific common MACs, such as HMAC, however would probably work.
Oct
18
awarded  Yearling
Oct
16
reviewed Close Repeated Encryption using same/different Encryption systems
Oct
16
reviewed Leave Open How is multiplication inverted in IDEA's decryption round?
Oct
16
reviewed Close Hill Cipher - Unknown plaintext attack, known key
Oct
16
reviewed No Action Needed Testing if a password for an eCryptfs mount is valid
Oct
16
reviewed Reviewed DSA generate signature and verify