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Physical security describes security measures that are designed to deny unauthorized access to facilities, equipment, and resources and to protect personnel and property from damage or harm (such as espionage, theft, or terrorist attacks). Physical security involves the use of multiple layers of interdependent systems that can include CCTV surveillance, security guards, protective barriers, locks, access control, perimeter intrusion detection, deterrent systems, fire protection, and other systems designed to protect persons and property. Physical security systems for protected facilities are generally intended to: deter potential intruders (e.g. warning signs, security lighting and perimeter markings); detect intrusions and monitor/record intruders (e.g. intruder alarms and CCTV systems); and trigger appropriate incident responses (e.g. by security guards and police). It is up to security designers, architects and analysts to balance security controls against risks, taking into account the costs of specifying, developing, testing, implementing, using, managing, monitoring and maintaining the controls, along with broader issues such as aesthetics, human rights, health and safety, and societal norms or conventions. Physical access security measures that are appropriate for a high security prison or a military site may be inappropriate in an office, a home or a vehicle, although the principles are similar. Natural surveillance and Crime prevention through environmental design The goal of deterrence methods is to convince potential attackers that a successful attack is unlikely due to strong defenses. The initial layer of security for a campus, building, office,, or other physical space uses crime prevention through environmental design to deter threats. Some of the most common examples are also the most basic: warning signs or window stickers, fences, vehicle barriers, vehicle height-restrictors, restricted access points, security lighting and trenches. Physical barriers such as fences, walls, and vehicle barriers act as the outermost layer of security.

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Adversarial Laser Beam: Effective Physical-World Attack to DNNs in a Blink

Shaokai Ye, Yuan He

Though it is well known that the performance of deep neural networks (DNNs) degrades under certain light conditions, there exists no study on the threats of light beams emitted from some physical source as adversarial attacker on DNNs in a real-world scenario. In this work, we show by simply using a laser beam that DNNs are easily fooled. To this end, we propose a novel attack method called Adversarial Laser Beam (AdvLB), which enables manipulation of laser beam's physical parameters to perform adversarial attack. Experiments demonstrate the effectiveness of our proposed approach in both digital- and physical-settings. We further empirically analyze the evaluation results and reveal that the proposed laser beam attack may lead to some interesting prediction errors of the state-of-the-art DNNs. We envisage that the proposed AdvLB method enriches the current family of adversarial attacks and builds the foundation for future robustness studies for light.

IEEE COMPUTER SOC2021

Physical security

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La surveillance est l'acte d’observer des activités (humaines en général) ou un lieu. Techniquement, on parle aussi de supervision ou de monitoring. Secrète ou évidente, elle est ancienne ; il y a , L'Art de la guerre de Sun Tzu, décrivait comment utiliser des espions contre des ennemis. Récemment, l’électronique moderne et la technologie informatique, conjointement au développement des satellites, de l'internet et du smartphone ont ouvert de nouveaux champs et moyens à la surveillance (individuelle ou de masse).

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