Script kiddies are would-be hackers who know enough to run a pre-coded script against a vulnerable machine, but not enough to create such a script in the first place.

In order to further enhance the performance of the coded system, effective joint iterative decoding technique and novel pre-decoding technique are proposed.

With the remarkable acceleration of the railway, the pre emitting codes technique within the station on coded track circuit is widely applied as a basic technical equipment for train safety.