ETSI TS 101 053-3的目的是规定TETRA标准认证和密钥管理算法集TAA1的管理规则。该算法集用于TETRA产品的空中接口安全。TAA1规范由以下三部分组成:第1部分:算法规范；第2部分:设计一致性测试数据；第3部分:算法输入/输出测试数据。本文件中描述的程序适用于本规范第1部分和第2部分。对于每种算法，第1部分和第2部分都是保密的。每个规范的第3部分均不保密，可直接从TAA1保管人处获得（见第5.2条）。本部分规范的分发没有限制。 第4条规定了管理结构。该结构根据涉及TAA1管理的负责人（ETSI、ETSI技术委员会TCCE、TAA1保管人和批准接收人）以及他们之间的关系和互动进行定义。第5条规定了向批准接收人交付TAA1的程序。本条款由附录A补充，附录A规定了要交付的项目。第6条涉及批准组织接收TAA1的标准，以及批准接收者的责任。本条款由附件B补充，附件B包含由每个批准接收人签署的保密和限制使用承诺。 第7条涉及TAA1托管人的任命和责任。

The purpose of ETSI TS 101 053-3 is to specify the rules for the management of the TETRA standard authentication and key management algorithm set TAA1. This algorithm set is intended for air interface security in TETRA products.The specification for TAA1 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 TAA1 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 TAA1 (ETSI, ETSI Technical Committee TCCE, TAA1 Custodian and approved recipients) together with the relationships and interactions between them.The procedures for delivering TAA1 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 TAA1 and with the responsibilities of an approved recipient. This clause is supplemented by annex B which contains a Confidentiality and Restricted Usage Undertaking to be signed by each approved recipient.Clause 7 is concerned with the appointment and responsibilities of the TAA1 Custodian.