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Key: In encryption, a
key is a sequence of characters used to encode
and decode a file. You can enter a key in two
formats: alphanumeric and condensed (hexadecimal).
In the network access security market, "key"
often refers to the "token," or authentication
tool, a device utilized to send and receive challenges
and responses during the user authentication process.
Keys may be small, hand-held hardware devices
similar to pocket calculators or credit cards,
or they may be loaded onto a PC as copy-protected,
software.
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