krb5-kdc - 1.18.3-6+deb11u5 main

Kerberos is a system for authenticating users and services on a network.
Kerberos is a trusted third-party service. That means that there is a
third party (the Kerberos server) that is trusted by all the entities on
the network (users and services, usually called "principals").
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This is the MIT reference implementation of Kerberos V5.
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This package contains the Kerberos key server (KDC). The KDC manages all
authentication credentials for a Kerberos realm, holds the master keys
for the realm, and responds to authentication requests. This package
should be installed on both master and slave KDCs.