Cryptography

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Awarded 6645 times.
Is it safe to reuse an IV 100 times to a single key with AES CBC?
Awarded 7 hours ago
IV in RSA Encrypted Private Key
Awarded 8 hours ago
Wrong key length for EC public key
Awarded 15 hours ago
Is this password-cracking challenge possible?
Awarded 23 hours ago
Is it guaranteed that all possible random numbers can be produced?
Awarded yesterday
How big does M need to be in Blum Blum Shub?
Awarded 2 days ago
What do NM-CPA and NM-CCA mean?
Awarded 2 days ago
Weak Decisional Diffie-Hellman Problem
Awarded Feb 20 at 4:07
AES-CBC decrypts to wrong output?
Awarded Feb 19 at 13:10
How to decode Playfair when only a small part of key is available?
Awarded Feb 19 at 11:35
Can schnorr-signatures be used to ensure public keys are of the correct form (namely $Y= x \cdot G$)?
Awarded Feb 19 at 0:12
Can Hash Functions take fixed-size input?
Awarded Feb 17 at 3:25
Should I calculate SHA-256 hash of a raw bytes of a token or it's hex encoding?
Awarded Feb 16 at 13:33
How do we solve Shammir 2,3 sharring scheme where arithmetic is modulo?
Awarded Feb 15 at 16:12
What is the most efficient 1-out-of-N Oblivious Transfer construction described in current literature?
Awarded Feb 13 at 19:10
Why is private key chosen to be less than chosen prime in diffie-hellman?
Awarded Feb 13 at 12:48
Is ECDSA obsolete/deprecated?
Awarded Feb 12 at 21:05
Does the following equation hold in bilinear pairings?
Awarded Feb 12 at 6:09
Single-block hash construction based on a block cipher with two fixed keys
Awarded Feb 11 at 22:16
Does a man-in-the-middle attack apply in this scenario?
Awarded Feb 11 at 17:42
Match bcrypt hash with plaintext
Awarded Feb 10 at 21:41
Diffie-Hellman key generation
Awarded Feb 10 at 16:31
GetModulus negligible probability
Awarded Feb 9 at 12:50
AES GCM SIV implementation
Awarded Feb 9 at 10:21
Are variable-length crypto hash functions still susceptible to collisions?
Awarded Feb 9 at 5:55
Can Blake2 be a replacement for double SHA-256?
Awarded Feb 8 at 23:31
Can anyone explain to me the difference between the OTP (one-time pad) and Vernam Cipher?
Awarded Feb 8 at 21:32
Do you use a salt when encrypting a password or just when hashing a password?
Awarded Feb 8 at 19:56
Cryptography Engineering - Design Principles and Practical Applications - Chapter 9 Generating Randomness - Section 9.4 The Generator
Awarded Feb 8 at 7:36
How to map output of hash algorithm to a finite field
Awarded Feb 8 at 3:21
How does recovering a message from a signature, as described by RSA, prove that the message was signed with a private key?
Awarded Feb 5 at 16:37
Adding curve25519 to tinyec
Awarded Feb 5 at 15:48
Blum Blum Shub Pseudo-Random Generator Requirements
Awarded Feb 4 at 2:57
What is the difference between zk-SNARK and NIZK?
Awarded Feb 1 at 22:34
Yao's theorem for the uniform case
Awarded Jan 31 at 14:43
Can we do Multi-Prime Diffie-Hellman?
Awarded Jan 31 at 9:31
Is it safe to send a hashed password over HTTPS or what is the most secure method of authentication?
Awarded Jan 30 at 7:07
What is the runtime complexity of the `BLAKE2` hash function?
Awarded Jan 29 at 0:56
How is the session key more secure than the public key?
Awarded Jan 28 at 19:05
Different encryption standards and how they relate to auth and algorithms
Awarded Jan 28 at 3:52
Could a symmetric encrypted communication with a SHA-512 hash still be manipulated?
Awarded Jan 27 at 19:27
Will an algorithm that constantly changes the order of 10 hash functions be protected from an ASIC?
Awarded Jan 27 at 11:10
Why should a distribution being pseudorandom strictly be a sequence of distributions being pseudorandom
Awarded Jan 26 at 14:06
Modular equation system
Awarded Jan 25 at 19:34
Using authenticated encryption along with signing
Awarded Jan 25 at 15:46
Need help to understand this RSA common modulus attack Python code
Awarded Jan 24 at 23:18
What is the public key length of RSA and Ed25519?
Awarded Jan 23 at 4:51
AES-128/CTR/NoPadding HMAC vs Signature
Awarded Jan 22 at 21:16
Why does the TLS spec for TLS-PSK say not to derive the shared secret from a password?
Awarded Jan 22 at 16:41
OpenSSL FIPS integrity check
Awarded Jan 22 at 10:49
Does anyone have any hard ciphers to be cracked for fun?
Awarded Jan 22 at 5:33
How can Hashed Value be same in length extension attack?
Awarded Jan 22 at 0:34
What is the overhead of GCM? And how are GCM tags signed by RSA/PKI?
Awarded Jan 21 at 5:17
Byte At A time ECB Attack
Awarded Jan 21 at 1:05
Verify correct answer transparently
Awarded Jan 20 at 13:55
Attack MD5 with limited input and partial information
Awarded Jan 19 at 19:15
Encryption algorithms that require more work to decrypt versus encrypt?
Awarded Jan 19 at 18:26
How can Whatsapp identify forwarded attachments
Awarded Jan 19 at 15:56
Decryption formula of Plaintext Block Chaining (PBC) mode of a block cipher
Awarded Jan 19 at 14:56
What is the need for Diffie-Hellman key exchange when we have asymmetric encryption?
Awarded Jan 19 at 14:34
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