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something they have (such as an access badge ), something they are (such as a biometric feature), or some combination of these items. this is known as multi-factor authentication . the typical credential is an access card or key-fob, and newer software can also turn users' smartphones into access devices
. [ ] there are many card technologies including magnetic stripe, bar code, wiegand , khz proximity, -bit card-swipe, contact smart cards, and contactless smart cards . also available are key-fobs, which are more compact than id cards, and attach to a key ring. biometric technologies include fingerprint...
https://en.wikipedia.org/wiki/Access_control
something they have (such as an access badge ), something they are (such as a biometric feature), or some combination of these items. this is known as multi-factor authentication . the typical credential is an access card or key-fob, and newer software can also turn users' smartphones into access devices
. [ ] there are many card technologies including magnetic stripe, bar code, wiegand , khz proximity, -bit card-swipe, contact smart cards, and contactless smart cards . also available are key-fobs, which are more compact than id cards, and attach to a key ring. biometric technologies include fingerprint...
https://en.wikipedia.org/wiki/Access_control