论文标题
基于伽利略ACA的半辅助信号身份验证
Semi-Assisted Signal Authentication based on Galileo ACAS
论文作者
论文摘要
提出了一个名为半辅助身份验证的GNSS信号身份验证概念。它基于从已经存在的加密信号中的一些毫秒的键流序列的重新加密和发布。键流在信号空间中传输后的大约几秒钟后，信号广播了键，允许在接收器处解密序列和A-posteriori相关性。该概念特有为Galileo E1-B的Galileo辅助商业身份验证服务（ACAS），其使用用于解密密钥的OSNMA，而E6C则被认为是在不久的将来被加密的。这项工作提出了ACA密码操作和信号处理和身份验证验证的模型。可以提供半辅助身份验证，而无需对现有GNSS的信号计划进行任何修改，而无需披露信号加密密钥，并且根据其存储功能，可以提供几天的接收器自主权。
A GNSS signal authentication concept named semi-assisted authentication is proposed. It is based on the re-encryption and publication of keystream sequences of some milliseconds from an already existing encrypted signal. Some seconds after the keystreams are transmitted in the signal-in-space, the signal broadcasts the key allowing to decrypt the sequences and the a-posteriori correlation at the receiver. The concept is particularized as Galileo Assisted Commercial Authentication Service, or ACAS, for Galileo E1-B, with OSNMA used for the decryption keys, and E6C, assumed to be encrypted in the near future. This work proposes the ACAS cryptographic operations and a model for signal processing and authentication verification. Semi-assisted authentication can be provided without any modification to the signal plan of an existing GNSS, without the disclosure of signal encryption keys, and for several days of receiver autonomy, depending on its storage capabilities.
