本文件规定了TETRA标准加密算法TEA4的管理规则。这 该算法用于TETRA产品中的空中接口加密。TEA4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 每种算法都是保密的。每个规范的第3部分都不是机密信息，可以直接从TEA4保管人处获得（参见 第5.3条）。本部分规范的分发没有限制。第4条定义了管理结构。这一结构是根据项目中涉及的负责人定义的 TEA4的管理（ETSI、ETSI项目TETRA、TEA4保管人和批准的接收人）以及 他们之间的关系和互动。第5条规定了将TEA4交付给批准接收人的程序。本条补充如下: 附件A规定了要交付的项目。第6条涉及批准组织接收TEA4的标准，以及 认可接收人的责任。本条款由附件B补充，附件B包含保密和 限制使用承诺书须由每个经批准的接收人签署。第7条涉及TEA4托管人的任命和责任。此外，在本条款中 描述了临时保管人的临时角色。

The present document specifies rules for the management of the TETRA standard encryption algorithm TEA4. This algorithm is intended for air interface encryption in TETRA products.The specification for TEA4 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 TEA4 Custodian (see clause 5.3). 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 the TEA4 (ETSI, ETSI PROJECT TETRA, TEA4 Custodian and approved recipients) together with the relationships and interactions between them.The procedures for delivering the TEA4 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 the TEA4 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 TEA4 Custodian. Furthermore in this clause the temporary role of the Interim Custodian is described.