Thumbscan
A thumbscan was a biometric identification consisting of an image of an individual's thumbprint. The process of obtaining this image was also called a thumbscan. It was often used to record an individual's participation in a contract, presence at an event, or acceptance of an agreement.

In early 2370, a Cardassian Gul's thumbscan on a Kressari PADD proved adequate evidence to show a connection between Cardassia and The Circle — immediately ending that organization and toppling the political career of its leader, Minister Jaro Essa. ()

Later that year, Quark tried to get Inglatu's thumbscan, thus making the contract between the Ferengi and the Dosi official. ()

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Medical scans
Identification technology

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