from the intro: “This Best Current Practice document describes techniques for producing random quantities that will be resistant to attack. It recommend

from the intro: “This Best Current Practice document describes techniques for producing random quantities that will be resistant to attack. It recommends that future systems include hardware random number generation or provide access to existing hardware that can be used for this purpose. It suggests methods for use if such hardware is not available, and it gives some estimates of the number of random bits required for sample applications.”