# 6G Mobile Networks: Key Technologies, Directions, and Advances
## 6 Implementation of Security in 6G Network
### Security Challenges Associated with 6G Network  
Although 5G specs remain in development and 5G connectivity isn't yet completely available, 6G cellular communications have been anticipated. In several instances, the partnership between 6G and AI might have opposing ends when it comes to preserving or violating privacy and security concerns. Because 6G's standardised features & standards have not yet been established, there's a dearth of material that explains how secure and private 6G networks will be [81]. Here are a few security issues that the 6G network has to deal with:  
* Based on Artificial Intelligence: AI technologies have a stronger influence on privacy. In certain ways, the proper use of AI could safeguard privacy in 6G; however, in other ways, privacy breaches may happen. AI models are vulnerable to privacy threats throughout the development & training stages. * Poisonous attacks: false regression results and misclassification due to the modification of training data using malicious samples that have been purposefully created (e.g., inadequate flagging or alteration of annotated data). * Evasion attacks: by adding problems to the test cases, one might try to go past the learned model during the testing stage. * ML API-based Attacks: Whenever a malicious party makes API requests and attacks a machine learning model to get predictions on feature vector inputs, model inverting (recovering data for training), model extract (revealing architectures while jeopardising model confidentiality), & membership inferences (using the model output to make predictions based upon training examples and ML models) could all be part of it. * Physical assaults upon infrastructure and communications disruption choices and data management are hampered by deliberate interruptions & deficiencies in communication and computing infrastructure, which may even bring down whole AI systems. * AI framework infringement: The majority of AI remedies make use of current AI/ML frameworks. The legitimacy of AI/ML functionalities is targeted by flaws in such artifacts or conventional attack vectors against its software, firmware, and hardware environment (particularly cloud-centric operations). * Based on Distributed Ledger Technology: It's probable that now the security concerns in Blockchain and smart contracts will have an implied impact on 6G networks as a consequence of the planned collaboration among DLT and 6G. The bulk of these attacks are the consequence of issues with software development, limitations imposed by programming languages, and vulnerabilities in network access protection. Additionally, both corporate and commercial blockchain systems could face similar security issues [82]. 1. The potential for an eclipse attack: blockchain nodes might receive misleading information that might lead to the validation of bogus transactions whenever connections are interrupted or dispersed. 2. 51% Attack: Cyber attackers can dominate the blockchain if they corrupt open-source blockchain apps and get or control at least 51% of the mining power. 3. End-user vulnerabilities: People may overlook or lose their private keys, which might compromise their blockchain-stored resources (e.g., identity theft, malware, phishing attacks). 4. Software Vulnerability: The decentralised paradigm of several blockchains may be permanently damaged when such DLT initiatives attempt to deploy shakily specific responses on operational blockchains. * Based on Quantum Communication: It's really anticipated that quantum-safe encryption will be implemented in the post-quantum era as a result of the development of quantum computing. Due to its propensity to exploit the quantum characteristics of data, quantum computing might already be able to provide total randomization & security to enhance overall transmission quality. Physical layer security and post-quantum cryptography integration might lead to safe 6G lines of communication. Quantum security procedures have the ability to be used in prospective 6G app scenarios.