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aug 17 at 13:34
How much would it cost in U.S. dollars to brute force a 256 bit key in a year? — ir01 931419
aug 13 at 15:20
Can two different pairs of RSA key have the same modulus? — CodesInChaos 5,9641927
aug 8 at 18:08
Is there a secure cryptosystem that can be performed mentally? — Ilmari Karonen 6,291725
aug 1 at 17:54
How can I use asymmetric encryption, such as RSA, to encrypt an arbitrary length of plaintext? — Thomas Pornin 19.1k13571
jul 31 at 16:44
Is a book cipher provably secure? — Thomas Pornin 19.1k13571
jul 31 at 9:53
Does AES have any fixed-points? — Paŭlo Ebermann♦ 9,76521743
jul 24 at 10:51
Basic explanation of Elliptic Curve Cryptography? — Thomas Pornin 19.1k13571
jul 19 at 7:41
How exactly would someone attempt to analyse ciphertext produced by popular encryption products such as Truecrypt/PGP? — Rory Alsop 232112
jul 17 at 22:40
Is Convergent Encryption really secure? — David Schwartz 2,647413
jul 15 at 10:26
What differentiates a password hash from a cryptographic hash besides speed? — Jesper Mortensen 34119
jul 9 at 17:08
“SHA-256” vs “any 256 bits of SHA-512”, which is more secure? — fgrieu 9,9641237
jun 26 '12 at 19:00
Does the generator size matter in Diffie-Hellman? — Thomas Pornin 19.1k13571
jun 19 '12 at 21:27
HMAC vs MAC functions — Ilmari Karonen 6,291725
jun 15 '12 at 13:35
Why is public-key encryption so much less efficient than secret-key encryption? — Thomas Pornin 19.1k13571
jun 13 '12 at 21:48
Google is using RC4, but isn't RC4 considered unsafe? — Thomas Pornin 19.1k13571
jun 11 '12 at 8:17
What is the difference between known-plaintext attack and chosen-plaintext attack? — Hendrik Brummermann♦ 503223
may 31 '12 at 19:32
Is every output of a hash function possible? — fgrieu 9,9641237
may 28 '12 at 16:31
What is the use of REAL random number generators in cryptography? — Paŭlo Ebermann♦ 9,76521743
may 23 '12 at 18:25
Is SHA-512 bijective when hashing a single 512-bit block? — Thomas Pornin 19.1k13571
may 16 '12 at 0:34
How much would it cost in U.S. dollars to brute force a 256 bit key in a year? — mikeazo♦ 7,6051737
may 12 '12 at 1:22
Does NTRU decrypt correctly now? — Prashand Gupta 1413
may 10 '12 at 13:06
What are the details of the DES weakness of reusing the same IV in CBC mode with the same key? — Thomas Pornin 19.1k13571
may 9 '12 at 21:20
Why is AES resistant to known-plaintext attacks? — Paŭlo Ebermann♦ 9,76521743
may 4 '12 at 14:37
Can two different pairs of RSA key have the same modulus? — mikeazo♦ 7,6051737
may 3 '12 at 17:32
Why did NIST remove The Lempel-Ziv Compression test from the Statistical Test Suite? — Brandon Carter 307312
apr 30 '12 at 23:30
Are there practical upper limits of RSA key lengths? — Thomas Pornin 19.1k13571
apr 30 '12 at 21:50
How to fairly select a random number for a game without trusting a third party? — PulpSpy 4,4891720
apr 26 '12 at 17:53
Why is elliptic curve cryptography not widely used, compared to RSA? — Thomas Pornin 19.1k13571
apr 25 '12 at 16:07
How long does it take to crack DES and AES? — Samuel Neves 1,02749
apr 25 '12 at 11:32
What tests can I do to ensure my PRNG is working correctly? — Thomas Pornin 19.1k13571
apr 10 '12 at 15:33
Cracking Pre-Paid Cards — Thomas Pornin 19.1k13571
apr 6 '12 at 23:16
Could one prevent double spending in decentralized digital currencies (like Bitcoin) without all transactions being public? — David Schwartz 2,647413
mar 31 '12 at 18:48
How big an RSA key is considered secure today? — fgrieu 9,9641237
mar 30 '12 at 10:32
How long would the 100 Year Cryptography Project have secured its data had it been started 100 years ago? — Thomas Pornin 19.1k13571
mar 24 '12 at 13:45
Taking advantage of one-time pad key reuse? — mixedmath 506112
mar 23 '12 at 15:09
Why do we use encrypt-decrypt-encrypt (EDE) in 3DES, rather than encrypting three times? — poncho 14.6k1628
mar 10 '12 at 11:50
Can a computationally unbounded adversary break any public-key encryption scheme? — poncho 14.6k1628
mar 2 '12 at 15:15
How are primes generated for RSA? — mikeazo♦ 7,6051737
feb 26 '12 at 11:42
How do I apply differential cryptanalysis to a block cipher? — uygar.raf 41949
feb 26 '12 at 11:37
How can I generate large prime numbers for RSA? — jug 35526
feb 17 '12 at 19:39
Information leakage from the ecryptfs filesystem — Dustin Kirkland 26318
feb 7 '12 at 9:13
Why do we need asymmetric algorithms for key exchange? — T_C 19613
feb 4 '12 at 14:38
How can I generate large prime numbers for RSA? — giuper 1312
feb 1 '12 at 19:34
Should we MAC-then-encrypt or encrypt-then-MAC? — Thomas Pornin 19.1k13571
feb 1 '12 at 17:38
Necessity of Randomness of Salts? — Antony Vennard 2,49211023
jan 27 '12 at 11:06
Which algorithms are used to factorize large integers? — Thomas Pornin 19.1k13571
jan 18 '12 at 23:55
RSA with small exponents? — Thomas Pornin 19.1k13571
jan 14 '12 at 10:53
Why does PBKDF2 xor the iterations of the hash function together? — Thomas Pornin 19.1k13571
jan 9 '12 at 23:40
Is it possible to create an easy to use encryption/decryption method that will never be comprimised? — Thomas Pornin 19.1k13571
jan 6 '12 at 20:51
Why programming languages don't provide simple encryption methods? — David Schwartz 2,647413
jan 1 '12 at 7:51
Known methods for constant time (table-free) AES implementation using 'standard' operations? — Thomas Pornin 19.1k13571
dec 31 '11 at 14:57
Is using slow password hashing on the client side easier attackable than on the server side? — Thomas Pornin 19.1k13571
dec 6 '11 at 18:34
Is digest=HASH(HASH(a)+HASH(b)) equivalent to publishing two digests? — fgrieu 9,9641237
nov 24 '11 at 21:43
What makes a hash function good for password hashing? — nealmcb 301110
nov 21 '11 at 23:08
Time Capsule cryptography? — PulpSpy 4,4891720
nov 15 '11 at 20:52
Best way to reduce chance of hash collisions: Multiple hashes, or larger hash? — Thomas Pornin 19.1k13571
nov 10 '11 at 12:02
Why is it insecure to use a randomized IV for CBC-MAC instead of an all-zero IV? — Paŭlo Ebermann♦ 9,76521743
nov 9 '11 at 22:21
Is there a hash function with 2048bit output? — emboss 21318
nov 9 '11 at 11:23
How much would it cost in U.S. dollars to brute force a 256 bit key in a year? — Thomas Pornin 19.1k13571
nov 5 '11 at 16:32
How were the DES S-box values determined? — Tangurena 956410
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