Historical
X9 TR-31 2010
Interoperable Secure Key Exchange Key Block Specification for Symmetric Algorithms
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 asymmetric key. 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.
Accredited Standards Committee, Inc. - Financial Industry Standards [ascx9]