fgrieu

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I'm an engineer with experience in applied cryptography, in particular in Smart Card systems.


201 Answers

newest activity votes
26
How big an RSA key is considered secure today?
mar 3 '12 at 11:29
15
Is it feasible to build an index of prime factors?
oct 21 '11 at 11:43
15
Is digest=HASH(HASH(a)+HASH(b)) equivalent to publishing two digests?
aug 22 '11 at 17:41
13
Is this encryption algorithm build from MD5 secure?
mar 6 at 15:36
13
“SHA-256” vs “any 256 bits of SHA-512”, which is more secure?
jul 6 '12 at 12:34
13
Is every output of a hash function possible?
may 23 '12 at 12:54
12
What is a smart card?
jan 27 at 18:27
11
How random are commercial TRNGS
may 23 at 4:52
11
Does RSA work for any message M?
oct 20 '11 at 20:02
10
Why exactly is Blowfish faster than AES?
apr 17 at 6:52
10
Is SHA-1 still practical secure under specific scenarios?
feb 27 at 20:13
10
Time Capsule cryptography?
oct 22 '11 at 9:24
9
CBC-MAC , fixed length, all blocks returned
may 3 at 11:34
9
Can we replace the XOR operation in DES with some other operation?
feb 10 at 21:11
9
A situation where security by obscurity might be the best solution - or am I wrong?
dec 19 at 12:48
9
How practical are side-channel attacks and how much of a concern are they?
sep 12 at 10:44
9
Encrypting small values with RSA private key
sep 12 '11 at 4:02
9
Do MD5's weaknesses affect Oplop?
aug 9 at 17:05
9
Is Wiener's attack on RSA extendable to larger keys with low hamming weight?
may 6 '12 at 7:05
9
What is an efficient random number generation algorithm
feb 25 '12 at 12:34
8
Why are bitwise rotations used in cryptography?
jun 2 at 17:09
8
PBKDF2 for key diversification
feb 11 at 20:19
8
Why is asymmetric cryptography bad for huge data?
dec 20 at 5:18
8
Impacts of not using RSA exponent of 65537
jul 1 '12 at 10:49
7
Why should I use an Initialization Vector (IV) when I have unique keys?
jun 6 at 3:28
7
Signature schemes for underpowered devices (8bit microcontroller)
apr 9 at 5:49
7
Encrypting a key with the same key
feb 15 at 12:54
7
Initialize a PRNG with a password
jan 23 at 22:12
7
creating a small number from a cryptographically secure random string
dec 16 at 18:03
7
Is this password migration strategy secure?
jun 18 '12 at 15:52
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