# 6G Mobile Networks: Key Technologies, Directions, and Advances
## 6 Implementation of Security in 6G Network
### Remediation Steps to the Security Challenges  
Due to the ever-increasing and large-scale challenges associated with 6G technology, there have to be some steps taken in order to remediate the issues and occurrences as a result of the assaults by malicious intruders. Some of the resolution steps are described below:  
* Distributed and Scalable AI/ML security: Self-X (self-configuration, self-monitoring, self-healing, and self-optimization) tasks would be carried out by autonomous networks in 6G with little to no user intervention. Distributed AI/ML approaches should impose quick controls & analytics on the enormous quantity of data obtained in 6G networks because the ubiquitous usage of AI/ML would be implemented in such a distributed and large-scale system across multiple use cases, including network management. Distributed AI/ML may be used for security at many stages of 6G cybersecurity defence & prevention. The benefits of autonomous operation, improved precision, and predictive capabilities for security analytics are where AI/ML-driven cybersecurity finds its usefulness.
* Security for Quantum Communication: Quantum communication rules like quantum key distribution have the ability to be used in a variety of 6G scenarios, including those for ocean communication, satellite communication, terrestrial wireless networks, and THz communications systems. Quantum key distribution (QKD) uses quantum theory to create a private key and distribute it among two lawful parties, making it suitable for traditional key distribution systems. Quantum-safe encryption is expected to be implemented in the post-quantum period as a result of the development of quantum computing. The advent of quantum algorithms might enable the polynomial-time solution of the discrete logarithmic issue, the fundamental difficulty in existing asymmetric cryptography.
* Physical Layer Security: At each level, the network has security methods that may be employed individually to build an additional defence or collectively throughout levels for applications with low resources. 6G will make use of physical-level security techniques to offer an adaptable extra layer of security in an environment of novel enabling technologies. Classifying the channel's backscatter as a protective measure against this eavesdropping method can help certain eavesdroppers be found, but not everyone of them. Molecular communication (MC) is a potential technology for 6G in several healthcare systems since bionanomalines interact using chemical signals or molecules in an aqueous environment. While dealing with a number of privacy and safety concerns relating to the communication, authentication, and encryption processes, MC manages to provide security for extremely confidential material.
* Solution to Parameter attack: Input validation, user authentication, access control, and rate restriction are ways to stop parameter assaults.
* Identity security: Identity assaults may be avoided by implementing authenticating (Signed JWT tokens, OpenID connect), authoring (role-based access control, attribute-based access control, and access control lists), and both.
* Prevention against Man-in-the-middle attack: Utilization of VPNs and safe secured communications (e.g., IPsec, SSLfHLS & HIP).
* Prevention against DDoS attacks: Throttling or rate-limiting the use of APIs, deploying API gateways and micro gateways, and using AI-based API security to conduct continuous monitoring can all help avoid assaults that direct distributed denial of service.
* Resolution against Data leakage: The following methods can be used to prevent data exposure: authenticating the relationship among the intent producer and consumer, like signed JWT tokens and OpenID Connect; limiting access through access control measures like role-based access control and OAuth 2.0; and further utilising communication security through TCP/IP protocols (TLS 1.2).