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About This Item

 

Full Description

This document describes a method consistent with the requirements of ANS X9.24 Retail Financial Services Symmetric Key Management Part 1 for the secure exchange of keys and other sensitive data between two devices that share a symmetric key exchange key. This method may also be used for the storage of keys under a symmetric key. This method is designed to operate within the existing capabilities of devices used in the retail financial services industry. This document is not a security standard and is not intended to establish security requirements. It is intended instead to provide an interoperable method of implementing security requirements and policies.

About the 2009 supplement:
This supplement contains clarifications to the proper usage of keys utilized to protect the key block defined in TR-31. TR-31 should be read with these clarifications taken into account.
 

Document History

  1. X9 TR-31-2018


    Interoperable Secure Key Exchange Key Block Specification

    • Most Recent
  2. X9 TR-31-2010


    Interoperable Secure Key Exchange Key Block Specification for Symmetric Algorithms

    • Historical Version
  3. X9 TR-31-2005

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    Interoperable Secure Key Exchange Key Block Specification for Symmetric Algorithms, Includes Supplement (2009)

    • Historical Version