SecurID card

An authentication token from Security Dynamics, Inc., Bedford, MA, (www.securid.com), that uses a smart card that authorized users keep in their possession.
The card’s microprocessor and the host computer are synchronized by a unique number and the time of day. When users log onto a SecurID -enabled host, they type in the number displayed on their cards at that moment as an additional passcode.
If the number matches the number that the host computers, the user is presumed to be the valid holder of the card. SecurID card.

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