Summary
While multimodal devices dominate Internet search results for "multimodal security," a highly important use of the term refers to the security strategy of applying of multiple security measures to an area or an access point. Multimodal security is an application of the defense in depth principle. This is also called levels of security or levels of protection.
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Levels of Security
This issue's column follows up on January's topic, Security Layers, which describes an approach to relating security functions (prevent, deter, detect, delay, assess, respond and recover) to facility zones or areas. Below we go one step further to conside...
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