The deadline for the 8th International Workshop on Cyber-Physical Systems Security (CPS-Sec), co-located with IEEE CNS 2023 is approaching. The scientific evolution of digital, analog, and physical devices and their interactions with the networked systems created the Cyber-Physical Systems (CPS). Today, the boundary between cyber and physical systems is blurring. CPS covers a multitude of smart devices, ranging from smartphones and tablets to devices and applications which exist in industrial, transportation, medical, home security, building automation, emergency management, power, and many other systems. These all enable the vision of CPS by allowing human beings to interact with the physical world and serve critical functions in our lives. Given the popularity of CPS applications, securing them against malicious activities is of utmost importance. Otherwise, malfunctioning and insecure CPS devices and applications can cause enormous damage to individuals, businesses, and nations. Following the success of the previous editions, the 8th IEEE International Workshop on Cyber-Physical Systems Security 2023 (CPS-Sec 2023) aims to represent a forum for researchers and practitioners from industry and academia interested in the areas of CPS security. Therefore, CPS-Sec seeks novel submissions describing practical and theoretical solutions for cyber security challenges in CPS. Submissions may represent any application area for CPS. Hence, papers that are pertinent to the security of embedded systems, the Internet of Things (IoT), Supervisory Control and Data Acquisition (SCADA) Systems, Smart-Grids, Critical Infrastructure Networks, Transportation Systems, and Medical Devices are all welcome. Example topics of interest are given below, but are not limited to: Secure CPS architectures Authentication mechanisms for CPS Access control for CPS Blockchain applications for CPS Data security and privacy for CPS Forensics for CPS Intrusion detection for CPS Trusted-computing in CPS Energy-efficient and secure CPS Availability, recovery, and auditing for CPS Distributed secure solutions for CPS Threat models for CPS Physical layer security for CPS Use of AI and ML in CPS Security Secure protocol design in CPS Vulnerability analysis of CPS Anonymization in CPS Security of CPS in automotive systems Security of CPS in aerospace systems Security of embedded systems Security of CPS in medical devices/systems Security of CPS in civil engineering systems/devices Security of industrial control systems Security of Internet-of-Things Security on heterogeneous CPS Important Dates: Submission Deadline: July 26, 2023 Acceptance Notification: August 21, 2023 Camera Ready: September 5, 2023 Workshop Date: October 5, 2023 For more information, please visit the website https://cns2023.ieee-cns.org/workshop/workshop/cyber-physical-systems-security-workshop