HP-UX Directory Server 8.1 Administrator (766147-001, March 2014)

A new ACI keyword minssf allows you to set access control based on how secure the connection
is.
Consider the following example for ACI that requires a SSF of 56 for you to modify your password:
aci: (targetattr="userPassword")(version 3.0; acl "
Require secure password changes"; allow (write) userdn="ldap:///self" and ssf>="56";)
Access based on the security strength of the connection 499