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may 5 at 1:19
What is a white-box implementation of a cryptographic algorithm? — ir01 931419
apr 21 at 1:14
How is CipherCloud doing homomorphic encryption? — sashank 6701313
apr 20 at 21:08
Should I trust CipherCloud? [closed] — D.W. 8,032827
apr 3 at 12:13
How practical are side-channel attacks and how much of a concern are they? — mikeazo♦ 7,5951737
mar 26 at 2:00
Are safe primes $p=2^k \pm s$ with $s$ small less recommandable than others as a discrete log modulus? — fgrieu 9,9541237
mar 11 at 0:00
How well does scrypt perform on different architectures / OSes? — ripper234 23717
feb 28 at 16:00
Is SHA-512 bijective when hashing a single 512-bit block? — SDL 38719
feb 14 at 22:30
Selective format-compliant JPEG encryption? — Carlos 815
feb 4 at 6:49
For Diffie-Hellman, must g be a generator? — mikeazo♦ 7,5951737
jan 31 at 12:04
Should I use ECB or CBC encryption mode for my block cipher? — silverback 206211
jan 24 at 21:32
Why is MixColumns omitted from the last round of AES? — Fixee 867214
jan 22 at 15:52
Known methods for constant time (table-free) AES implementation using 'standard' operations? — Jack Lloyd 960513
jan 20 at 0:06
Why is H(k||x) not a secure MAC construction? — Anne Nonimus 1583
jan 7 at 7:01
Could one construct a cipher that is secure for friendly parties to use but insecure for hostile parties? — Ethan Heilman 959416
jan 2 at 22:00
No SHA-1 Collision? Yet SHA1 is broken? — user1131467 1706
jan 2 at 5:30
Encryption scheme for social-network-like data sharing data via untrusted server? — denisw 1534
dec 23 at 6:58
Best way to reduce chance of hash collisions: Multiple hashes, or larger hash? — Theodor Kleynhans 6215
dec 21 at 1:06
Where do I securely store the key for a system where the source is visible? — Rob Cowell 1535
dec 13 at 3:20
Is digest=HASH(HASH(a)+HASH(b)) equivalent to publishing two digests? — gavinandresen 1535
dec 8 at 21:49
Google is using RC4, but isn't RC4 considered unsafe? — jonasl 17615
dec 5 at 6:36
RSA with small exponents? — Elliott 23126
oct 31 at 22:55
Can you create a strong blockcipher with small blocksize, given a strong blockcipher of conventional blocksize? — Fixee 867214
oct 23 at 15:06
Is AES-256 weaker than 192 and 128 bit versions? — quantumSoup 2065
oct 17 at 0:04
How to choose a padding mode with AES — Cocowalla 1646
oct 16 at 23:59
What do the magic numbers 0x5c and 0x36 in the opad/ipad calc in HMAC do? — sneak 1685
oct 16 at 23:59
Is every output of a hash function possible? — Polynomial 479113
oct 16 at 23:59
Do parts of a hash carry the properties of the entire hash? — Marcin 1534
oct 16 at 23:59
Purpose of outer key in HMAC — CodesInChaos 5,9641927
oct 16 at 23:59
Why use a 1-2 Oblivious Transfer instead of a 1 out of n Oblivious Transfer? — Nerdling 1535
oct 14 at 16:07
What is the general justification for the hardness of finding preimages for cryptographic hash functions? — Ethan Heilman 959416
sep 15 at 23:00
Taking advantage of one-time pad key reuse? — Elliott 23126
sep 6 at 5:41
How long does it take to crack DES and AES? — huyichen 22028
aug 22 at 8:58
At the current time, is SHA256 the de facto standard for strong cryptographic hashes? — Andrew 1174
aug 18 at 16:30
Hashing or encrypting twice to increase security? — maaku 613
aug 17 at 0:27
How long would the 100 Year Cryptography Project have secured its data had it been started 100 years ago? — Marsh Ray 982310
aug 14 at 8:11
With sufficient randomness, is XOR an acceptable mechanism for encrypting? — John Gietzen 325211
aug 12 at 5:38
Is this password migration strategy secure? — Major Major 1905
aug 10 at 23:27
Is there a simple hash function that one can compute without a computer? — FUZxxl 1686
aug 1 at 9:46
Is Convergent Encryption really secure? — Justin King 20325
jul 19 at 10:41
How robust is discrete logarithm in GF(2^n) ? — Thomas Pornin 19.1k13571
jul 19 at 9:51
Can I encrypt user input in a way I can't decrypt it for a certain period of time? — dan 585
jul 18 at 13:37
Why does nobody use (or break) the Camellia Cipher? — Chris Smith 355110
jul 15 at 11:41
“SHA-256” vs “any 256 bits of SHA-512”, which is more secure? — Pacerier 1656
jul 11 at 19:05
What differentiates a password hash from a cryptographic hash besides speed? — Steven Xu 1785
jun 21 '12 at 21:28
Is there a secure cryptosystem that can be performed mentally? — John Gietzen 325211
jun 19 '12 at 22:02
Is CBC really dead? — Mike 1807
jun 17 '12 at 22:20
Why is public-key encryption so much less efficient than secret-key encryption? — JustinY 1535
jun 17 '12 at 22:20
How can we reason about the cryptographic capabilities of code-breaking agencies like the NSA or GCHQ? — jokoon 20715
jun 13 '12 at 9:23
About Cryptography in a Character Language — mixedmath 506112
jun 10 '12 at 22:17
What are the main weaknesses, if any, of a Playfair cipher? — Arlen Beiler 1886
jun 10 '12 at 22:17
How to provide secure “vanity” bitcoin address service? — nealmcb 301110
jun 10 '12 at 22:12
Why do we append the length of the message in SHA-1 pre-processing? — Am1rr3zA 27537
may 23 '12 at 16:10
Why does PBKDF2 xor the iterations of the hash function together? — Cameron Skinner 1534
may 15 '12 at 8:33
Security of N bit HMAC — ralu 23117
may 3 '12 at 10:27
Why can't one implement bcrypt in Cuda? — Rook 41819
apr 30 '12 at 15:20
How to fairly select a random number for a game without trusting a third party? — billpg 20517
apr 25 '12 at 15:52
Why is elliptic curve cryptography not widely used, compared to RSA? — Vineet Menon 22027
apr 11 '12 at 18:28
How big an RSA key is considered secure today? — Inaimathi 2006
mar 24 '12 at 13:55
Is the CBC weakness in XML Encryption a new discovery? Are other applications vulnerable? — makerofthings7 359112
mar 23 '12 at 21:49
Is using slow password hashing on the client side easier attackable than on the server side? — Paŭlo Ebermann♦ 9,76521743
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