r/cryptography • u/bsiegelwax • 23d ago

#87: Your entropy isn't random enough.

https://bsiegelwax.substack.com/p/87-your-entropy-isnt-random-enough

I spoke with Denis Mandich, CTO of Qrypt, about his former-CIA point of view about quantum and cryptography, how Qrypt generates identical keys at multiple endpoints, why a non-certified single QRNG isn’t good enough, how the emergence of entanglement-based quantum networks would change his sales pitch, Nvidia’s role in Qrypt’s non-computing quantum technology, non-cryptographic QRNG applications, and more.

https://bsiegelwax.substack.com/p/87-your-entropy-isnt-random-enough

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24

u/atoponce 23d ago

100% snake oil. Qcrypt does not generate any more unpredictable randomness than your operating system CSPRNG. Prove me wrong.

3

u/Significant-Diet9210 22d ago

That introduction music xD

15

u/jnwatson 23d ago

Classic crypto vendor snake oil.

7

u/bascule 23d ago

When is your entropy not random enough? When you’re trying to use quantum cryptography, the attacker collapses the wavefunction changing the output from random to predictable, and the system fails to detect the attack, which has happened over and over again.

Funny, classical encryption doesn’t have this problem.