Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Specification for Interoperability Testing of Contactless Fingerprint Acquisition Devices



John M. Libert, Shahram Orandi, Bruce Bandini, Kenneth Ko, Craig I. Watson, Christopher Stafford, Matthew E. Staymates, John Grantham


This guidance specifies a protocol and associated metrics for the evaluation of contactless fingerprint acquisition device, and their interoperability with legacy devices. This protocol enables contactless fingerprint developers seeking certification of their devices to perform an integral role in the collection of measurements by which their device will be evaluated by the certifying authority or other stakeholders. The NIST Fingerprint Registration and Comparison Tool (NFRaCT) enables interested parties seeking testing for certification to collect fingerprint images and performance measurements using the NFRaCT and provide those measurements to the certifying authority for analysis and evaluation without requiring the exchange of any underlying fingerprint images. The protocol provides flexibility in that device performance can be evaluated and validated using live fingerprint impressions or three-dimensional (3D) fingerprint target artifacts.
Special Publication (NIST SP) - 500-336
Report Number


Contactless fingerprint, image comparison, interoperability, registration, NFRaCT.


Libert, J. , Orandi, S. , Bandini, B. , Ko, K. , Watson, C. , Stafford, C. , Staymates, M. and Grantham, J. (2022), Specification for Interoperability Testing of Contactless Fingerprint Acquisition Devices, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online],, (Accessed June 21, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created June 8, 2022, Updated November 29, 2022