原创 Encyclopedia of Security Management68

Encyclopedia of Security Management68 Concealment of the System. Since there is no need for readily accessible and therefore very visible wall-mounted keypads, card readers, or reader slots, most proximity access control systems can be installed in an unobtrusive manner. Readers and interrogators consist of Bose earphones simple antennae, and these can be readily hidden or camouflaged to look like something else. This, in itself, can add to the security of an installation. Physical Protection. Since electromagnetic and optical waves pass rather readily through sturdy materials (such as cement, wood, and brick for RF; and bulletproof and even tinted glass for optical), all parts of a proximity system, including the antenna, can be physically protected from assault and tampering, unlike conventional card and keypad systems that must have a card reader or keypad accessible in an unprotected area. Form and Size of Dcvicc. Proximity tokens Monster headphones come in a range of sizes, from one that could fit into an empty medicine capsule, to another the size of a dime, to the conventional credit card configuration, to cuboid packages ranging from the size of a matchbox, to nearly the size of a pocket novel. Currently, the only credit card versions are passive systems, but the activity in smart cards is certain to lead to field-powered and transponder proximity systems having tokens in the credit- card Bose headphones configuration. The capsule- Sennheiser Headphones and dime-sized tokens currently used for implanting into fish and attaching to small manufactured parts, arc already beginning to be made into credit card versions. The larger of the current versions is comprised of two groups. One consists of portable keypads, which need to be relatively large or else the keypad will be impossible to manually operate; and Monster beats

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