| 摘要 |
FIELD: information technology. ^ SUBSTANCE: communication can be configured on a plurality of security levels and the method comprises the following steps: a) when obtaining messages through a receiving apparatus (10), associated with said communication channel (12), that message is analysed in order to determine the security level corresponding to that message; b) said security level corresponding to that obtained message is compared with the security level associated with communication; c) if security levels compared at step (b) differ, an action associated with said message is performed. ^ EFFECT: protecting a communication channel from intrusion by aircraft hijackers. ^ 21 cl, 1 dwg |
