| 摘要 |
<p>The method involves re-sending second signal toward an identification device (ID), so that the latter can detect a change of phase between the second questioning signal (VE) generates by the ID and the second signal (VR) received by the ID. An access in prohibited when the sequence of detected change of phase does not correspond to the identification code known by the ID. An Independent claim is included for: (a) a system for implementing claimed method</p> |
