BS ISO/IEC 11889-4:2015包含C代码，该代码描述了 ISO/IEC 11889-3中的命令代码。ISO/IEC 11889本部分中的代码扩充了ISO/IEC 11889-2 以及ISO/IEC 11889-3，以提供TPM的完整描述，包括 执行命令操作的代码。ISO/IEC 11889本部分中的任何代码可替换为在以下情况下提供类似结果的代码: 与ISO/IEC 11889-3中的动作代码接口。ISO/IEC 11889本部分中的代码行为 ISO-1183中的接口未包含在标准规范中。密码 附录中提供了完整性说明，即允许从以下方面全面实施ISO/IEC 11889: 提供的代码。ISO/IEC 11889-3和ISO/IEC 11889本部分中的代码旨在定义 符合标准的TPM。在某些情况下（例如固件更新），不可能提供兼容的 实施在这些情况下，供应商提供的任何满足一般要求的实现 ISO/IEC 11889中提供的功能说明- 3将符合要求。ISO/IEC 11889-3和ISO/IEC 11889的本部分中的代码不是为了满足任何特定的 一致性ISO/IEC 11889也不要求TPM满足任何特定的一致性水平。交叉引用:ISO/IEC 9797-2ISO/IEC 10116:2006ISO/IEC 11889-1ISO/IEC 11889-2ISO/IEC 11889-3FIPS PUB 186-3GM/T 0002:2012GM/T 0003.1:2012GM/T 0003.2:2012GM/T 0003.3:2012GM/T 0003.5:2012GM/T 0004:2012EEE 1363:2000IEEE 1363a:2004IEEE 1363:2000IETF RFC 3447ISO/IEC 10118-3ISO/IEC 15946-1ISO/IEC 18033- 3 IST SP800-56ANIST SP800-108取代了BS ISO/IEC 11889-4:2009，该标准仍然有效。购买本文件时，所有当前可用的修订版均包含在本文件中。

BS ISO/IEC 11889-4:2015 contains C code that describes the algorithms and methods used by the command code in ISO/IEC 11889-3. The code in this part of ISO/IEC 11889 augments ISO/IEC 11889-2 and ISO/IEC 11889-3 to provide a complete description of a TPM, including the supporting framework for the code that performs the command actions.Any code in this part of ISO/IEC 11889 may be replaced by code that provides similar results when interfacing to the action code in ISO/IEC 11889-3. The behavior of code in this part of ISO/IEC 11889 that is not included in an annex is normative, as observed at the interfaces with ISO/IEC 11889-3 code. Code in an annex is provided for completeness, that is, to allow a full implementation of ISO/IEC 11889 from the provided code.The code in ISO/IEC 11889-3 and this part of ISO/IEC 11889 is written to define the behavior of a compliant TPM. In some cases (e.g., firmware update), it is not possible to provide a compliant implementation. In those cases, any implementation provided by the vendor that meets the general description of the function provided in ISO/IEC 11889-3 would be compliant.The code in ISO/IEC 11889-3 and this part of ISO/IEC 11889 is not written to meet any particular level of conformance nor does ISO/IEC 11889 require that a TPM meet any particular level of conformance.Cross References:ISO/IEC 9797-2ISO/IEC 10116:2006ISO/IEC 11889-1ISO/IEC 11889-2ISO/IEC 11889-3FIPS PUB 186-3GM/T 0002:2012GM/T 0003.1:2012GM/T 0003.2:2012GM/T 0003.3:2012GM/T 0003.5:2012GM/T 0004:2012IEEE 1363:2000IEEE 1363a:2004IEEE 1363:2000IETF RFC 3447ISO/IEC 10118-3ISO/IEC 14888-3ISO/IEC 15946-1ISO/IEC 18033-3NIST SP800-56ANIST SP800-108Replaces BS ISO/IEC 11889-4:2009 which remains currentAll current amendments available at time of purchase are included with the purchase of this document.