Std.Crypto.derive

fn

This is a callable function.

What it does

A key derived from a password, slowly and on purpose.

Slowness is the property: a password is short enough to guess, and this is

what makes each guess cost the guesser what it cost the owner once. The

iteration count is therefore not a tuning knob to lower — raise it as

machines get faster. See Std.App.Password for storing one.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.