Collaborate Disseminate
I need to randomly pick 10 numbers from 1 to 2000. It is very important that this rng cannot be predicted/hacked in any way. Would this be a safe/proper way to do it:
int randomInt;
SecureRandom random = new SecureRandom();
for (int i = 1;… Continue reading SecureRandom safety?
Can SymmetricKey be used as substitute for SecRandomCopyBytes? I found this code snippet in WWDC19 video
var key = Array(repeating: 0, count: 32)
let err = SecRandomCopyBytes(kSecRandomDefault, keyByteCount, &key)
memset_s(&key, 32… Continue reading SymmetricKey vs SecRandomCopyBytes
I’m the maintainer of pypdf, a Python library for reading/manipulating PDF documents. I recently discovered that pypdf used random instead of secrets for …
Generating the initialization vector (IV) in AES
As part of generating the U-Val… Continue reading Is using weak random numbers for the initialization vector of AES just a theoretical issue?
If I generate a large true random number and I seed a CSPRNG with it, then can the output of this CSPRNG be used anywhere where there is a need for a true random number?
For example, if Alice and Bob both know the seed, then could the outp… Continue reading Randomness of seeded cryptographically secure random number generator
If I generate a large true random number and I seed a CSPRNG with it, then can the output of this CSPRNG be used anywhere where there is a need for a true random number?
For example, if Alice and Bob both know the seed, then could the outp… Continue reading Randomness of seeded cryptographically secure random number generator
I’m learning for the university and have to do a Mifare Classic replay attack.
I don’t really know how to do that and hope some of you can help me at least a bit.
The goal is to get the number of iterations after the start of the random nu… Continue reading How to do a Mifare Classic Replay attack [migrated]
was trying to brute force a random number generated by the ruby method rand which generated a random float number between 0.0 and 1.0 excluding 1.0.
so for example I have this code:
Time.now.to_s.split(//).sort_by {rand}.join
this produce… Continue reading brute forcing a pseudoRandom number Generator
Let’s say I have generated 16 integers (between 0 and 128) using Python
from random import seed, randint
seed(1234)
randoms = [randint(0, 128) for _ in range(0, 16)]
If we have a rough knowledge of the seed (its number of digits for examp… Continue reading Is it possible to retrieve seed from a few random numbers?
I want to generate 6 random words using Wiktionary and random numbers from /dev/random. I’ll get a random number with /dev/random and then use the word from that index.
I know /dev/random should be used to generate random keys, but if it’s… Continue reading How does /dev/random not leak future bytes from old ones
I am creating an internal application that will be used to generate and manage self-signed certificates and certificate authorities. Its primary use will be for generating certificates used in SSL decryption by my clients’ firewalls.
My go… Continue reading ChaCha Single-Use RNG with All Zero Plaintext + Nonce