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Method and device for emitting messages for guaranteeing the authenticity of a system and method and device for verifying the authenticity of such a system
Method and device for emitting messages for guaranteeing the authenticity of a system and method and device for verifying the authenticity of such a system
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机译：发出用于保证系统真实性的消息的方法和装置以及用于验证这种系统真实性的方法和装置
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摘要
The invention relates to a method for emitting messages in order to guarantee the authenticity of the system that emitted said messages. The method includes the following steps, namely: a step comprising the selection of a threshold value used in a threshold-based cryptographic scheme, which value is greater than or equal to 1; - a step comprising the generation of a set of partial information items, such that knowledge of a number i, greater than or equal to the threshold value K, of partial information items can be used to verify a signature of at least part of the messages; and a fourth step comprising the sending of each partial information item separately in a distinct message. The invention also relates to a device for emitting messages for guaranteeing the authenticity of the system that emitted the messages, as well as to a method and a device for verifying the authenticity of such a system. In particular, the invention is suitable for global satellite-based radiocommunication and radionavigation systems.
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