ANSI X9。82-3-2007（R2017）由四部分组成:第1部分:概述和基本原理第2部分:熵源第3部分:确定性随机位发生器机制第4部分:随机位发生器构造在阅读第3部分之前，应阅读第1部分，了解本标准的基本理解。这部分 ANSI X9。82（第3部分）定义了使用确定性方法生成随机位的机制。DRBG机制本身不足以定义随机位生成器（RBG）；本标准第2部分和第4部分对RBG的设计提出了进一步的要求。第三部分包括:1。确定性随机比特发生器（DRBG）模型，2。DRBG机制的要求，3。 基于哈希函数或分组密码，或基于数论问题的DRBG机制规范，4。实施问题，以及5。保证方面的考虑。DRBG基于本部分标准规定的DRBG机制，包括熵输入源。第3部分规定了几种不同的DRBG机制，当本标准获得批准时，所有这些机制都提供了可接受的安全性。然而，如果在某一特定类别的机制上发现新的攻击，多种经批准的机制将允许及时过渡到不同类别的DRBG机制。随机数生成不需要两个实体之间的互操作性，例如。 g、 ，通信实体可以在不影响其通信能力的情况下使用不同的DRBG机制。因此，实体可以为其应用选择一种合适的DRBG机制；关于DRBG选择的讨论见附录D。随机位发生器的精确结构、设计和开发不在本标准范围内。

ANSI X9.82-3-2007 (R2017) consists of four parts:Part 1: Overview and Basic PrinciplesPart 2: Entropy SourcesPart 3: Deterministic Random Bit Generator MechanismsPart 4: Random Bit Generator ConstructionPart 1 should be read for a basic understanding of this Standard before reading Part 3. This part of ANSI X9.82 (Part 3) defines mechanisms for the generation of random bits using deterministic methods. The DRBG mechanisms are not sufficient by themselves to define a Random Bit Generator (RBG); Parts 2 and 4 of this Standard provide further requirements for the design of an RBG.Part 3 includes:1. A model for a deterministic random bit generator (DRBG),2. Requirements for DRBG mechanisms,3. Specifications for DRBG mechanisms that are based on hash functions or block ciphers, or are based on number theoretic problems,4. Implementation issues, and5. Assurance considerations.A DRBG is based on a DRBG mechanism as specified in this part of the Standard and includes a source of entropy input. Part 3 specifies several diverse DRBG mechanisms, all of which provided acceptable security when this Standard was approved. However, in the event that new attacks are found on a particular class of mechanisms, a diversity of approved mechanisms will allow a timely transition to a different class of DRBG mechanism.Random number generation does not require interoperability between two entities, e.g., communicating entities may use different DRBG mechanisms without affecting their ability to communicate. Therefore, an entity may choose a single appropriate DRBG mechanism for its applications; see Annex D for a discussion of DRBG selection.The precise structure, design and development of a random bit generator is outside the scope of this Standard.