Here&#x27;s the situation: adversaries are using a set of compromised credentials to fraudulently access a system.<p>The next step is revocation and reissuing credentials.<p>You cannot revoke someone&#x27;s fingerprints. Or at least they&#x27;ll probably object once you fire up the blowtorch.<p>Are you familiar with the biometric menagerie? 
<a href="http:&#x2F;&#x2F;ieeexplore.ieee.org&#x2F;xpl&#x2F;articleDetails.jsp?arnumber=4711054" rel="nofollow">http:&#x2F;&#x2F;ieeexplore.ieee.org&#x2F;xpl&#x2F;articleDetails.jsp?arnumber=4...</a><p>Sorry that&#x27;s gated, but tl;dr, there are marginal cases in biometric systems where some individual&#x27;s data doesn&#x27;t work well, or messes with the recognition&#x2F;exclusion of others.