A fob, or more commonly called a key fob, is a small security
hardware device with built-in authentication used to control and
secure access to network services and data. The key fob displays a
randomly generated access code, which changes periodically, usually
every *0 to *0 seconds. A user first authenticates themselves on
the with
a personal identification number (PIN), followed by the current
code displayed on the device.
is
also a word used to describe a key chain and several other similar
items and devices. The word fob is believed to have originated from
watch fobs, which existed as early as ***8. The fob refers to an
ornament attached to a pocket-watch chain. Key chains, car
starters, garage door openers, and keyless entry devices on hotel
room doors are also called fobs.
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