131 reputation
4
bio website jstuber.net
location North Rhine-Westphalia, Germany
age 49
visits member for 3 years, 3 months
seen Oct 3 '13 at 17:04

I'm a free-lance embedded software developer who likes computer science, mathematics, electronics and foreign languages.

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rot13("fr") = "se"


Sep
11
comment Should we trust the NIST-recommended ECC parameters?
"It seems reasonable that an honest person did not anticipate the current paranoia level" I don't think so, as the discussion of the DES S-boxes is much older, and other people used nothing-up-my-sleeve numbers as a matter of course.
Jan
26
comment Hashing passwords with a salt - why use different salt for everyone?
The unique salt per password is there to prevent an attacker from amortizing his effort over many passwords. If you use the same salt for n passwords you make his job easier by a factor of n. Note that the salt is not secret.
Sep
21
comment What is the best method to determine the language used in a monoalphabetic substitution cipher?
Out of curiosity, can you tell us more about the context?
Sep
7
comment Is this “layered” XOR cipher secure?
With respect to the key space this would indeed be the worst possible encryption method.
Sep
5
awarded  Autobiographer
Sep
2
comment Is modern encryption needlessly complicated?
AES is much faster than your Blum-Blum-Shub setup.
Sep
1
awarded  Teacher
Sep
1
answered Calculating the amount of zero bits to be appended to the message
Aug
3
comment What alphanumeric string length can be used to guarantee no hash collisions from CRC-64?
Assuming a standard encoding of characters as 8 bit bytes you can guarantee uniqueness only up to 8 characters.
Jul
16
comment Why does PBKDF2 xor the iterations of the hash function together?
I wonder why they don't also hash the counter i for U_i?
Jul
13
awarded  Precognitive
Jul
13
comment Taking advantage of one-time pad key reuse?
amazon.com/Decrypted-Secrets-Methods-Maxims-Cryptology/dp/…
Jul
13
awarded  Supporter