Security issues in optical networks physical layer

Network management and maintenance in optical networks faces additional security challenges arose from increased transparency in optical network components and systems. A review on existing physical security breaches on these types of networks will be presented. From these some of the methodologies for location and detection will be described and characterized in terms of applicability. Special focus will be given to the ones that are more prone to Passive optical networks due to its proximity to the user, leading to increased attack diversity.