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2. GateKeeper (access control device) - Wikipedia

   en.wikipedia.org/wiki/GateKeeper_(access_control...

   GateKeeper is a wireless proximity-based access control and authentication device that allows a user to automatically lock their computer by walking away and unlock it by walking back. The GateKeeper consists of a key fob (the device), a USB dongle to transmit the wireless signal, software to manage user credentials, and a password manager.

3. Automated border control system - Wikipedia

   en.wikipedia.org/wiki/Automated_border_control...

   Automated border control systems ( ABC) or eGates are automated self-service barriers which use data stored in a chip in biometric passports along with a photo or fingerprint taken at the time of entering the eGates to verify the passport holder's identity. Travellers undergo biometric verification using facial or iris recognition, fingerprints ...

4. Access control - Wikipedia

   en.wikipedia.org/wiki/Access_control

   A sailor checks an identification card (ID) before allowing a vehicle to enter a military installation. In physical security and information security, access control ( AC) is the selective restriction of access to a place or other resource, while access management describes the process. The act of accessing may mean consuming, entering, or ...

5. Protection ring - Wikipedia

   en.wikipedia.org/wiki/Protection_ring

   Computer operating systems provide different levels of access to resources. A protection ring is one of two or more hierarchical levels or layers of privilege within the architecture of a computer system. This is generally hardware-enforced by some CPU architectures that provide different CPU modes at the hardware or microcode level.

6. Gateway (telecommunications) - Wikipedia

   en.wikipedia.org/wiki/Gateway_(telecommunications)

   Gateway (telecommunications) A gateway is a piece of networking hardware or software used in telecommunications networks that allows data to flow from one discrete network to another. Gateways are distinct from routers or switches in that they communicate using more than one protocol to connect multiple networks [1] [2] and can operate at any ...

7. Field-programmable gate array - Wikipedia

   en.wikipedia.org/wiki/Field-programmable_gate_array

   A field-programmable gate array ( FPGA) is a type of configurable integrated circuit that can be repeatedly programmed post manufacturing. FPGAs are a subset of logic devices referred to as programmable logic devices ("PLDs"). They consist of an array of programmable logic blocks with a connecting grid, that can be configured "in the field" to ...