本文件旨在规定TETRA标准加密的管理规则 算法TEA2。该算法用于TETRA产品中的空中接口加密。TEA2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。第1部分和第2部分是 保密的每个规范的第3部分均不保密，可直接从TEA2保管人处获得 （见第6.5条）。本部分规范的分发没有限制。第4条规定了管理结构。这一结构是根据项目中涉及的负责人定义的 共同管理TEA2（ETSI、ETSI技术委员会TETRA、TEA2保管人和获批接收人） 他们之间的关系和互动。第5条涉及TEA2的使用规则。本条款由条款E补充，其中: 并列出了用户可以成为批准收件人的区域。第6条规定了向获批收件人交付TEA2的程序。本条补充如下: 第A条规定了要交付的物品。第7条涉及批准组织接收TEA2可交付成果的标准，以及 认可接收人的责任。本条款由附录B、C、CA和D补充，其中包含 保密和限制使用承诺书由每个经批准的接收方制造商、用户和 第三方供应商。第8条涉及TEA2托管人的任命和责任。

The purpose of the present document is to specify the rules for the management of the TETRA standard encryption algorithm TEA2. This algorithm is intended for air interface encryption in TETRA products.The specification for TEA2 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. The parts 1 and 2 are confidential.Part 3 of each of the specifications is not confidential and can be obtained directly from the TEA2 Custodian (see clause 6.5). 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 TEA2 (ETSI, ETSI Technical Committee TETRA, TEA2 Custodian and approved recipients) together with the relationships and interactions between them.Clause 5 is concerned with the rules for the use of TEA2. This clause is supplemented by clause E in which the states and territories are listed in which a User can become an approved recipient.The procedures for delivering TEA2 to approved recipients are defined in clause 6. This clause is supplemented by clause A that specifies the items that are to be delivered.Clause 7 is concerned with the criteria for approving an organization for receipt of TEA2 deliverables and with the responsibilities of an approved recipient. This clause is supplemented by annexes B, C, CA and D which contain a Confidentiality and Restricted Usage Undertaking to be signed by each approved recipient Manufacturer, User and Third Party Supplier.Clause 8 is concerned with the appointment and responsibilities of the TEA2 Custodian.