Use cryptographically random values where required #88
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Contributes to #86
This PR changes uses of the pseudo-RNG
System.Randomto the OS provided cryptographic RNG APISystem.Security.Cryptography.RandomNumberGeneratorwhere applicable. These randomizations can be optimized further but let's make it secure first 😅For example,
ZRANDMEMBERspecifies that the values must be "truly random".Didn't touch pseudo-random usage in tests.