krb5-pkinit 1.13.2+dfsg-5ubuntu2.2 (s390x binary) in ubuntu xenial

 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").
 .
 This is the MIT reference implementation of Kerberos V5.
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 This package contains a plugin for the PKINIT protocol, which allows
 Kerberos tickets to be obtained using public-key credentials such as
 X.509 certificates or a smart card. This plugin can be used by the
 client libraries and the KDC.