TR-34 protocol
The TR-34 protocol provides a method of securely distributing symmetric keys
using asymmetric techniques.
It is an implementation of the Unilateral Key Transport
Method defined in ANSI X9.24-2.
TR-34 specifies an interoperable method for one situation – the Distribution of Symmetric Keys using Asymmetric Techniques from a Single Key Distribution Host (KDH) to many Key Receiving Devices (KRDs). The KDH is assumed to be operated in a controlled environment. The KRDs may operate in uncontrolled environments.
TR-34 is a Technical Report. This is different from a standard, which is a mandatory set of rules that must be followed. A Technical Report is not mandatory, but provides guidance to those who are using the standards. In this case, TR-34 is a companion to the ANSI X9.24-2 standard, which defines requirements for key management performed using asymmetric key techniques.