密码技术可为涉密信息系统分级保护提供信息安全防护服务,保障信息机密性、完整性、可认证性和不可否认性。在涉密信息系统分级保护策略的设计和实施过程中,密码技术的科学选择与恰当管理,密级核定和安全域划分是非常重要的。结合信息系统分级保护要求,将属性基密码体制作为理论方法和技术支撑,本文提出了基于多层次映射的涉密信息系统密码应用框架。 Cryptographic technology can provide information security protection for hierarchical protection of classified information systems and ensure the confidentiality, integrity, authenticity and non-repudiation of information. In the design and implementation of hierarchical protection strategy of classified information system, it is very important that scientific selection and proper management of cryptographic technology, classified approval and security domain are classified. Combined with the hierarchical protection requirements of information systems, the attribute-based cryptographic system is used as a theoretical method and technical support. This paper presents a cryptographic application framework for classified information systems based on multi-level mapping.