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Congressionol Research Service
Informing the IegisI9tive debate since 1914


Updated August  22, 2024


Biometric Technologies and Global Security


Biometric technologies use unique biological or behavioral
attributes-such as DNA, fingerprints, cardiac signatures,
voice or gait patterns, and facial or ocular measurements-
to authenticate an individual's identity. Although biometric
technologies have been in use for decades, recent advances
in artificial intelligence (AI) and Big Data analytics have
expanded their application. As these technologies continue
to mature and proliferate, largely driven by advances in the
commercial  sector, they will likely hold growing
implications for congressional oversight, civil liberties, U.S.
defense authorizations and appropriations, military and
intelligence concepts of operations, and the future of war.

How are biometric technologes being
used   today?
Biometric technologies are currently used for a number of
congressionally authorized or mandated security
applications throughout the U.S. government. For example,
the Aviation and Transportation Security Act of 2001 (P.L.
107-71) granted the Transportation Security Administration
the authority to employ biometrics for passenger screening
and airport access control. Similarly, the Intelligence
Reform  and Terrorism Prevention Act of 2004 (P.L. 108-
458) required the Department of Homeland Security to
operate a biometric entry and exit data system to verify the
identity of foreign nationals seeking to enter or exit the
United States. These applications are intended to expedite
screening processes and reduce human error rates.

Biometric technologies are also used by law enforcement
agencies, such as the Secret Service and Federal Bureau of
Investigation, to assist in the investigation of crimes and to
identify missing persons and persons of interest. In
addition, the Department of Defense (DOD) has used
biometric technologies to identify, target, and disrupt
enemy  combatants and terrorists in Iraq, Afghanistan, and
elsewhere. The Government  Accountability Office has
assessed that, between 2008 and 2017, DOD used biometric
technologies to capture or kill 1,700 individuals and deny
92,000 individuals access to military bases.

According to a November 2023  DOD  Inspector General
(IG) report, some DOD components  have been operating
biometric technologies that [do] not have data encryption
capabilities and do not require the certification of
destruction or sanitization of biometric data when
biometric devices are disposed. The report notes that this
could jeopardize force protection by providing adversaries
with the biometric information and identities of friendly
forces and other individuals assisting the United States.
DOD   is to update DOD Directive 8521.01E, which
establishes the department's policy and bureaucratic
responsibilities for biometric technologies, by the first


quarter of FY2025 in order to address the IG's findings.
Congress may  monitor implementation of the directive.

How coud dbometric technologies be
used   in the  future?
DOD   is exploring a range of emerging biometric
technologies and biometric applications, including AI
techniques that could identify individuals in low-light or
otherwise obscured conditions and laser techniques that
could identify individuals at distances of around 200
meters. Such techniques could be employed in covert and
clandestine operations without an individual's knowledge
or consent.

In the future, biometric technologies could be integrated
into lethal autonomous weapon systems (LAWS), or
weapons  capable of selecting and engaging targets without
the need for manual human control or remote operation.
Such weapons  could potentially feature a database
containing the biometric identifiers of preapproved human
targets; the weapons could then use the database to
autonomously  locate, select, and engage human targets in
communications-degraded  or -denied environments where
traditional systems may not be able to operate.

Some  analysts have argued that this technology application
could increase precision in targeting, and thus improve
adherence to international humanitarian law (e.g., avoid
killing civilians), while others have argued that it is
inherently unethical and could violate international
humanitarian law. The United States does not currently
possess and is not known to be developing LAWS;
however, there is no prohibition on their development or the
incorporation of biometric technologies into autonomous
weapon  systems. Weapons manufacturers in both China and
Russia have stated that they are developing these systems,
which could include biometric features.

Biometric technologies could also be integrated into
localized or national data collection and surveillance
networks. For example, as Center for Security and
Emerging  Technology analyst Dahlia Peterson has noted,
[Chinese] officials maintain national DNA databases and
extensive video surveillance networks-augmented by Al-
enabled voice and facial recognition technology-to
monitor and track individuals within China. These systems
could continue to be linked and supplemented with private
information such as medical, travel, and purchase history.

Although the Chinese government claims that these
biometric applications contribute to predictive policing and
public safety, some analysts have argued that they provide a
means of imposing censorship and social control and could
enable human rights violations. Reports indicate that China