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Thomas Pornin earned this badge 43 times
oct 23 at 6:51Is AES-256 weaker than 192 and 128 bit versions?
oct 10 at 7:58understanding a length extension attack
oct 6 at 10:45Compressing EC private keys
oct 5 at 12:15Is it safe to use file's hash as IV?
sep 21 at 8:59Security of simple xor and s-box cipher?
aug 1 at 17:54How can I use asymmetric encryption, such as RSA, to encrypt an arbitrary length of plaintext?
jul 31 at 16:44Is a book cipher provably secure?
jul 24 at 10:51Basic explanation of Elliptic Curve Cryptography?
jun 26 '12 at 19:00Does the generator size matter in Diffie-Hellman?
jun 13 '12 at 21:48Google is using RC4, but isn't RC4 considered unsafe?
may 23 '12 at 18:25Is SHA-512 bijective when hashing a single 512-bit block?
may 10 '12 at 13:06What are the details of the DES weakness of reusing the same IV in CBC mode with the same key?
apr 30 '12 at 23:30Are there practical upper limits of RSA key lengths?
apr 26 '12 at 17:53Why is elliptic curve cryptography not widely used, compared to RSA?
apr 25 '12 at 11:32What tests can I do to ensure my PRNG is working correctly?
apr 10 '12 at 15:33Cracking Pre-Paid Cards
mar 30 '12 at 10:32How long would the 100 Year Cryptography Project have secured its data had it been started 100 years ago?
feb 1 '12 at 19:34Should we MAC-then-encrypt or encrypt-then-MAC?
jan 27 '12 at 11:06Which algorithms are used to factorize large integers?
jan 18 '12 at 23:55RSA with small exponents?
jan 14 '12 at 10:53Why does PBKDF2 xor the iterations of the hash function together?
jan 9 '12 at 23:40Is it possible to create an easy to use encryption/decryption method that will never be comprimised?
jan 1 '12 at 7:51Known methods for constant time (table-free) AES implementation using 'standard' operations?
dec 31 '11 at 14:57Is using slow password hashing on the client side easier attackable than on the server side?
oct 30 '11 at 23:25Why can't one implement bcrypt in Cuda?
oct 30 '11 at 1:02How can we reason about the cryptographic capabilities of code-breaking agencies like the NSA or GCHQ?
oct 3 '11 at 1:49What is the “Random Oracle Model” and why is it controversial?
aug 31 '11 at 8:31Does unbalancing a feistel cipher always improve security? Does it improve security at all?
aug 30 '11 at 16:35How does asymmetric encryption work?
aug 20 '11 at 13:05Should I use the first or last bits from a sha-256 hash?
aug 16 '11 at 16:37How should I calculate the entropy of a password?
aug 4 '11 at 6:04What is a white-box implementation of a cryptographic algorithm?
jul 26 '11 at 17:50Why do we append the length of the message in SHA-1 pre-processing?
jul 18 '11 at 8:34How were the DES S-box values determined?
jul 16 '11 at 15:25Identifying encryption method from encrypted string
jul 13 '11 at 8:36What are the practical difference between 256-bit, 192-bit, and 128-bit AES encryption?
jul 12 '11 at 23:20What are the benefits of the two permutation tables in DES?
jul 12 '11 at 19:14(post deleted or otherwise unavailable)