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ANSI X9.82 is concerned with the generation of random bits, primarily for use in cryptographic applications. While there has been extensive research on the subject of generating (pseudo)random bits using a Random Bit Generator (RBG) and an unknown seed value, creating such an unknown value has not been as well documented. As Part 1 of this Standard establishes, the only way for this seed value to provide real security is for it to be obtained from a source that provides sufficient entropy. Directly or indirectly, the seeding of an RBG will rely upon a non-deterministic process ?i.e., an entropy source. This part of ANS X9.82 describes the properties that an entropy source must have to make it suitable for use by cryptographic random bit generators.

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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 American National Standard (ANS) X9.82 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. Part 4 specifies how Approved RBGs shall be constructed, using components from Parts 2 and 3 of the Standard. Part 4 specifies constructions for an RBG, and constructions for building components that are used within those RBG constructions. The information in Part 4 is intended to be combined with the information in the Parts 2 and 3 in order to: Construct an RBG with the required security properties that will be compliant with the Standard, and Verify that an RBG has been constructed in compliance with the Standard. The precise structure, design and development of an RBG is outside the scope of this Standard.

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The Standard consists of four parts: Part 1: Overview and Basic Principles; Part 2: Entropy Sources; Part 3: Deterministic Random Bit Generator Mechanisms; Part 4: Random Bit Generator Construction.Part 3 includes: A model for a deterministic random bit generator (DRBG), Requirements for DRBG mechanisms, Specifications for DRBG mechanisms that are based on hash functions or block ciphers, or are based on number theoretic problems, Implementation issues, and Assurance considerations.

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This standard provides all parties involved in Electronic Benefits Transfer (EBT) transactions with technical specifications for exchanging financial transaction messages

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This standard provides all parties involved in Electronic Benefits Transfer (EBT) transactions with technical specifications for exchanging financial transaction messages

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This part of X9.105 Part 3 Identical to ISO 8583-3 establishes the role of the maintenance agency (MA) and specifies the procedures for adding messages and data elements to X9.105 Part 1 Identical to ISO 8583-1 and to codes listed in Annex A of X9.105 Part 1 Identical to ISO 8583-1. The responsibilities of the MA relate to all message type identifiers and classes, data elements and sub-elements, dataset identifiers and codes within X9.105 Part 1 Identical to ISO 8583-1, with the exception of Institution Identification Codes

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Errata sheet

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