| 摘要 |
Disclosed herein is a method for securing/unsecuring data exchanged by communication nodes. The method comprises: securing, by a first communication node (5), data to be sent to one or more second communication node(s) (8) on the basis of a specific security key, and unsecuring, by each second communication node (8), the secured data received from the first communication node (5) on the basis of said specific security key. The method is characterized by further comprising: synchronizing, by each communication node (5,8), a respective internal time reference to a global time reference so as to obtain a respective sync time reference, and extracting, by each communication node (5,8), the specific security key on the basis of the respective sync time reference from one and the same ordered sequence of security keys each of which is to be used in a respective validity time interval. |
