Further reading

For references and further information, refer to the following links:

• https://gcn.com/Articles/2014/08/07/Layer-1-network-encryption.aspx
• http://www.uebermeister.com/files/inside it/2016_Introduction_Encryption_Metro_and_Carrier_Ethernet.pdf
• http://ieeexplore.ieee.org/document/7781061/