![]() Furthermore, these systems are often exposed to the Internet enabling attackers to continuously attack them while new vulnerabilities are discovered everyday. In contrast, IP-based systems have diverse topologies and technologies making them far more complex and which results in much larger attack surface (e.g., VPNs, gateways, multiple servers, WiFi, access control systems, etc.). Attacks on these systems were either denial of service by cutting wires, video injection by intercepting the cable, and record tampering by physically interacting with the recording unit. Analog systems use cameras that transmit analog signals (typically over a coax cables) to a recording unit. ![]() Over the last few decades, surveillance technologies have evolved from analog systems to packet switched systems (over IPv4 & IPv6 networks). For example, technology for facial recognition, identifying threats, event-detection, tracking objects, and rapidly investigating incidents can be scaled to thousands of cameras over large geographical areas. Intelligent applications have made large surveillance networks practical to manage and utilize. They are in the streets, at train stations, workplaces, factories, and even at home. These days, video surveillance systems can be found everywhere. ![]()
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