Security mechanisms to protect IEEE 1588 synchronization: State of the art and trends

The limitations of Annex K, as defined in the second version of IEEE 1588 standard, lead the standardization committee to evolve from an integrated security solution to a set of internal and external security mechanisms. The aim of the group is to address different requirements and deployment paradigms of application specific profiles. In this paper, a comparative study of the proposed security solutions within the working group is presented. In addition, a new MACsec use case to provide hop-by-hop group security is introduced.