# Enhancing Security in Smart Robot Digital Twins Through Intrusion Detection Systems
## 3 Related Work
The authors of [17] propose a framework based on the concept of Security Orchestration, Automation, and Response (SOAR) tailored for IoT, leveraging DTs to manage IoT assets, orchestrate security measures, and implement rapid incident responses, including regular firmware updates and the adoption of IoT security standards. Given the threats analyzed above, the implementation of robust security measures is imperative. In this regard, the following sections will illustrate several security measures discussed in other works. Among these solutions, we find the following:  
* Secure Communication Protocols. Ensuring encrypted data transmission between physical and digital components using protocols such as TLS (Transport Layer Security) and VPNs (Virtual Private Networks) is necessary practice. In [18] is proposed the use of a DT architecture to secure communications in industrial environments, focusing on cryptographic protocols like TLS and VPNs. The solution involves the dynamic reconfiguration of communication channels (Conduits) and the use of advanced encryption algorithms to ensure both the security and performance of inter-zonal communications, aligned with the IEC 62443 standard [19]. * Identity and Access Management. [PERSON] et al. [20] propose an access management framework that integrates multi-factor authentication (MFA), role-based access control (RBAC), and zero-trust architectures to protect DTs. The solution includes ontological specifications for the semantic modeling of relationships between physical and digital components, ensuring secure authentication and authorization of users and devices in smart built environments. * Anomaly Detection Systems. [PERSON] et al. [21] propose an innovative anomaly detection system based on DTs for asset monitoring during operation and maintenance phases. The solution incorporates a Bayesian algorithm to detect contextual change points and integrates these with external operational data, enabling early identification of abnormal behaviors and reducing false alarms. The practical applicability of the system is demonstrated through a case study on centrifugal pumps in an HVAC system, contributing to the automated and efficient monitoring of asset conditions. * Blockchain Technology. In [22], the authors propose a conceptual model based on blockchain technology for its integration with DTs. Their solution includes a decentralized digital cycle (DDTC) that leverages blockchain to ensure data security, traceability, and integrity throughout the project lifecycle. They emphasize the use of smart contracts and distributed ledgers to enhance collaboration, transparency, and trust in the fragmented environments of the industry. * Redundancy and Backup Systems. Another interesting proposal is presented in [23], where a redundancy and backup system based on the integration of DTs with adaptive remedial Action Schemes is discussed. The solution employs a Weighted Least Squares (WLS) state estimator to ensure redundancy measured in case of data loss and to monitor voltage stability in real time. This approach enables adaptive load adjustment and dynamic calculation of remedial actions, ensuring the stability of the power grid and preventing voltage collapse. * The Use of Artificial Intelligence in Enhancing Security. According to [PERSON] et al. [24], who explore the use of explainable artificial intelligence (XAI) to enhance security in DT-based environments. The proposed solutions include anomaly detection, automated incident responses, and intelligent decision-making, all supported by explainable models that enable professionals to understand and trust security processes. These approaches contribute to the identification and mitigation of cyber threats, thereby improving the resilience of digital ecosystems. As highlighted above, it is imperative to implement robust and reliable security measures to prevent any actions that could compromise the smooth operation of a system. A concrete example of how DT systems can play a key role in worker safety is presented in [PERSON] et al.