密码学和安全应用广泛使用随机数和随机位。然而，在密码学的许多实际应用中，随机比特的生成是有问题的。ANSI X9的目的。82:第4部分:2011（R2017）规定了随机位发生器（RBG）的设计标准，并在需要时提供将随机位转换为随机数的方法。通过将使用随机位的应用程序的安全要求与生成这些位的RBG的安全声明相匹配，应用程序可以安全地使用由符合本标准的RBG生成的随机位。

Cryptography and security applications make extensive use of random numbers and random bits. However, the generation of random bits is problematic in many practical applications of cryptography. The purpose of ANSI X9.82: Part 4: 2011 (R2017) is to specify a standard for the design of random bit generators (RBGs) and to provide methods for converting the random bits to random numbers when required. By matching the security requirements of the application using the random bits with the security claims of the RBG generating those bits, an application can safely use the random bits produced by an RBG conforming to this Standard.