Abstract: A method performs time-synchronization between a master clock and a plurality of slave clocks. The method performs a forward time-synchronization from the master clock to the plurality of slave clocks. Further, the method performs a reverse time-synchronization from the plurality of slave clocks to a corresponding plurality of validator clocks. In addition, the method validates the time-synchronization between the plurality of slave clocks, notably between the master clock and the plurality of slave clocks, based on the plurality of validator clocks.