What characteristic is often reused by attackers in a replay biometric attack?

In the context of a replay biometric attack, attackers often target characteristics that can be easily captured, stored, and retransmitted, making them more susceptible to misuse. Fingerprints are particularly vulnerable in this regard because they can be collected from surfaces after a person touches them. Once a fingerprint is captured through various means, an attacker can use it in a replay attack to gain unauthorized access to a secured system or location.

Fingerprints are static traits; they do not change over time, which means a captured fingerprint can be used repeatedly. This reusability is a significant weakness in biometric systems relying on fingerprints unless additional layers of security are implemented to validate the authenticity of the individual presenting the biometric. Other biometrics, while they may also be vulnerable under specific conditions, typically require more sophisticated methods for capture and reuse compared to fingerprints.