Cryptography

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What is total key space in transposition algorithms
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Converting Ciphertext to a Number in RSA
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Difference between strongly universal and $\delta$ univeral hash functions
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What is the public key length of RSA and Ed25519?
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Multiple encryption using the same key
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secure PRFs and XOR
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When encrypting twice with two separate keys, can a single key decrypt both steps?
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Encrypting big numbers into small ones?
Awarded Oct 17 at 13:04
How fast does a pseudorandom number generator have to be in order to be competitive?
Awarded Oct 17 at 9:12
How does GRC password generator get 512 bit of secret data?
Awarded Oct 17 at 5:07
Is OpenPGP vulnerable to the "crypto doom principle"?
Awarded Oct 16 at 20:50
Are there transitive ciphers (either symmetric and asymmetric)
Awarded Oct 12 at 11:12
For SHA3-512, SHA512, and Whirlpool, which algorithm has least probability for collision and preimage collision?
Awarded Oct 12 at 9:10
Hill cipher: How to find an unknown key of unknown size
Awarded Oct 12 at 4:40
Comparison Vigènere vs. Monoalphabetic cipher
Awarded Oct 12 at 4:33
Is a one-way function pseudorandom?
Awarded Oct 11 at 23:45
About the Algebraic Normal Form (ANF) of S-Box in DES
Awarded Oct 11 at 19:31
Encryption and decryption using multiple different keys
Awarded Oct 11 at 18:47
Is Mega.nz encryption vulnerable to brute force cracking by quantum computers?
Awarded Oct 10 at 14:57
What are the implications of XORing ciphertext with plaintext?
Awarded Oct 10 at 2:51
Would DES be secure with 128 bit keys?
Awarded Oct 9 at 12:36
Why is $h(H, m) = E(m, H) \oplus m$ insecure?
Awarded Oct 9 at 4:47
What is the difference between these two TLS suites?
Awarded Oct 8 at 10:06
OCB - brute force against unknown IV
Awarded Oct 8 at 3:28
Does AES CTR mode store header information in encrypted files?
Awarded Oct 7 at 16:50
How to prove if a Hash Function is collision resistant
Awarded Oct 7 at 10:36
NTRU key size (confused)
Awarded Oct 7 at 9:25
What does $(\mathbb{Z}_n^*)^2$ mean?
Awarded Oct 7 at 5:42
Ed25519 PKCS8 private key example from IETF draft seems malformed
Awarded Oct 6 at 22:17
Which is the best AES mode of operation? [closed]
Awarded Oct 6 at 14:20
Finding sum of two encrypted numbers
Awarded Oct 5 at 5:18
Why does a perfect secrecy can be achieved when decryption correctness is not totally required?
Awarded Oct 4 at 21:31
How to show something is not a one-way function?
Awarded Oct 4 at 15:42
Can you tell me why doing scalar multiplication of a point on a Elliptic curve over a finite field gets to a point at infinity?
Awarded Oct 4 at 13:33
Encrypting twice with same key gives back plain text
Awarded Oct 3 at 18:25
Is there a standardized tree hash?
Awarded Oct 3 at 13:55
CBC mode is not IND-CCA2 secure with no prediction of IV
Awarded Oct 3 at 2:40
AES MixColumns what do I xor with
Awarded Oct 2 at 20:46
Zero knowledge proof for a discrete logarithm
Awarded Oct 2 at 9:40
Why is a too fast hash function not secure?
Awarded Oct 2 at 2:06
Arbitrary key size in RC4
Awarded Oct 1 at 20:01
Is the one-time pad still perfectly secret if all-zero keys are excluded?
Awarded Oct 1 at 7:52
Attacking CBC with predictable but encrypted IV
Awarded Sep 30 at 4:27
Computing IV for CBC from PBKDF2 + HKDF
Awarded Sep 29 at 23:27
What EC curve is used by Apple iOS platform?
Awarded Sep 29 at 9:35
Does AES-GCM without security tag turn into regular CTR Mode?
Awarded Sep 29 at 3:42
Definition of cryptographic advantage vs. probability of success
Awarded Sep 28 at 16:10
Is $q(n)=1/n$ a negligible function?
Awarded Sep 28 at 6:35
Is there are a metric based on collisions to compare bad hash functions?
Awarded Sep 28 at 2:51
What are the requirements from a Round function in Feistel network?
Awarded Sep 27 at 23:26
Can there be a need for 1024-bit (symmetric) encryption?
Awarded Sep 27 at 15:32
Making ECDSA public keys one bit shorter
Awarded Sep 27 at 13:35
What are the exceptions to Kerckhoffs's principle?
Awarded Sep 27 at 6:30
How are the PC-1 & PC-2 calculated for the DES block cipher?
Awarded Sep 27 at 4:33
Preferred SHA-2 hash algorithm for MGF1 in RSA
Awarded Sep 27 at 3:03
Two Round Feistel network
Awarded Sep 27 at 2:15
Why is SHA3 more secure than SHA2?
Awarded Sep 26 at 11:18
Right usage of PBKDF2 and login system questions
Awarded Sep 24 at 10:10
Discrete logarithm weak group
Awarded Sep 23 at 9:10
Decrypting SHA-256 with SHA-256 as input?
Awarded Sep 23 at 8:27
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