Collaborate Disseminate
Apologies if this seems like a trivial question.
I’ve been learning PRNG and cryptographic basics and I don’t think I’ve found an answer to this question (At least that I understand).
My understanding is that a PRNG has an internal state w… Continue reading Does the permutation cycle of a PRNG change completely with different seeds?
I’m developing jwt auth feature with Spring WebFlux. And, I found the blocking calls in jjwt library by using BlockHound.
The reason of blocking calls was SecureRandom use /dev/random to make random number in default on Linux system.
To pr… Continue reading Is it ok to use NativePRNGNonBlocking SecureRandom for making jwt? [duplicate]
There are a numerous passprase generators out there, but all (I have found) use English words to build the passphrase. I’d rather use German words, so I wrote a generator in Python that selects words from a large list of German words. I wo… Continue reading Passphrase generator using German word list and Python’s "secrets.choice()" to select from the list. Are those strong passphrases?
I’ve read the article from Unciphered about it, multiple times, and still fail to understand it.
It basically says that wallets generated by the BitcoinJS front-end library from 2011 to 2015 are vulnerable because of poor randomness genera… Continue reading What exactly is the Randstorm vulnerability?
I’m working on a project with a potentially high sensitivity to random quality.
I’ve looked at numpy and nvidia libraries but they are all not considered crypto secure generators.
I would like to basically buy? say, a terabyte of an extrem… Continue reading Where Can I Get Crypto Secure Random Data?
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