This module gives different ways of obtaining nonces.

A “nonce” is additional input provided to an encryption algorithm. The most important rule is that you cannot use the same nonce to encrypt more than one message. What will happen if you reuse a nonce depends on the details of the cryptographic algorithm, but, in general, expect the cryptography to fail completely in this case.

Random nonce generation

The easiest way to guarantee that nonces do not repeat is to use a random nonce every time. If the nonce is large enough, then the probably of a random nonce repeating will be negligible. All cryptographic functions provided by this library can be safely used with random nonces.

The generate function is great at generating new random nonces. The nonces are produced using the standard random package, so the generation is very fast.