scope:

The purpose of the present document is to specify the rules for the management of the TETRA standard authentication and key management algorithm set TAA2. This algorithm set is intended for air interface security in TETRA products.

The specification for TAA2 consists of the following three parts:

Part 1: Algorithm specification;

Part 2: Design conformance test data;

Part 3: Algorithm input/output test data.

The procedures described in the present document apply to Parts 1 and 2 of the specifications. Parts 1 and 2 are confidential for each of the algorithms.

Part 3 of each of the specifications is not confidential and can be obtained directly from the TAA2 Custodian (see clause 5.2). There are no restrictions on the distribution of this part of the specifications.

The management structure is defined in clause 4. This structure is defined in terms of the principals involved in the management of TAA2 (ETSI, ETSI Technical Committee TCCE, TAA2 Custodian and approved recipients) together with the relationships and interactions between them.

The procedures for delivering TAA2 to approved recipients are defined in clause 5. This clause is supplemented by annex A which specifies the items which are to be delivered.

Clause 6 is concerned with the criteria for approving an organization for receipt of TAA2 and with the responsibilities of an approved recipient.

Clause 7 is concerned with the appointment and responsibilities of the TAA2 Custodian.