[Cryptography] How do I tell if a byte sequence repeats?

[zeb at qtt.se]

> From: cryptography <cryptography-bounces+zeb=qtt.se at metzdowd.com> On Behalf Of Ray Dillinger
> Sent: Wednesday, 31 December 2025 06:31
>
> Ideally(?) you should find exactly one cycle, and it should contain 
> every possible state.
>
> Bear

Including every smaller cycle, yes?