METHOD FOR JUDGING SUCCESS OR FAILURE OF SECRECY RELEASE AND SECRECY RELEASE METHOD

摘要

A secrecy function is provided for making it possible to judge and recover a failure in the release of encryption in a short time by the layer 2 (RLC) secrecy function defined in the recommendation in 3GPP with respect to the secrecy function. In a wireless communication system with the secrecy function, a transmission terminal device transmits secret data including an inherent identifier and a reception terminal device judges failure or success in the release of secrecy by detecting the existence or non-existence of user inherent identifier at the time of the release of secrecy of the data.