Software-Defined Networks for Optical Networks Using Flexible Orchestration: Advances, Challenges, and Opportunities

Table 11

Reliability and security solution implementation for SDON.

Reference	Policy/algorithm/strategy	Problem addressed	Improvement/achievement	Weakness/limitation
[59] (2019)	The algorithm used was a “cryptographically generated address (CGA) algorithm” in conjunction with the “hash generated address (HGA)”	Network security and cost problems created by the initiation of certain security concept modules into network components	The proposed algorithm produced a lightweight security identity. Authentication and encryption scheme LTWA based on SDOAN	Measurement is limited to a specific model, which takes into consideration blocking rate, delay, and safety satisfaction
[60] (2018)	OpenFlow protocol + “effective PKI (public key infrastructure)” with a proposed “message feedback digital signatures”	Security level and connection success rate problem for optical networks that have a big size	Proposed augmented SDON that has a safety signalling system for improved security and reliable connection	The suggested scheme has much longer delay time than the conventional without the proposed security scheme
[61] (2018)	T-trail allocation (TTA) heuristic algorithm	Reliability problem in localising any single link failure in an SDON	Better than the conventional light path regarding dealing with single link failures in software-defined optical network	Limited to only single links