Encounter ID (IMAGE)

National Institute of Standards and Technology (NIST)

Encounter ID

Caption

NIST researchers developed a cryptographic system using encounter metrics. Encounter ID is a way of labeling an encounter between two people through a random number not linked to the device each person carries. To generate the randomized number Z, each device calculates using their private info (a and b) and what the other device is broadcasting (X and Y). Cryptography ensures that device A's Z is the same as Device B's Z.

Credit

B. Hayes/NIST derived from an image by M. Kraft/NIST

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Please credit B. Hayes/NIST and M. Kraft/NIST

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