ACARS message security ( AMS) implemented as an application and independent of the under-lying communications mechanism. AMS security schemes,combined with corresponding cryptographic al-gorithm,provide AMS security service of Data Confidentiality,Data Integrity and Message Authentication, Key Establishment. AMS message structure and sequence of operation is introduced,A hybrid scheme for aeronautical communications benefits from both asymmetric and symmetric schemes is proposed, Secure Session processes is analyzed. Simulation show that AMS ensures security of ACARS message against the primary safety threats.%ACARS消息安全( AMS)以一种独立于底层通信机制的应用方式,通过安全机制及支持该机制的加密算法,提供数据机密性、消息认证和完整性的安全服务。介绍了AMS消息结构和处理过程,建议采用一种综合对称和非对称加密系统优势的航空通信方案,分析了安全会话过程,仿真试验证明, AMS在面对安全威胁时能保证ACARS消息的安全传输。
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