| (I) A system that enables a user to access multiple computer
platforms (usually a set of hosts on the same network) or
application systems after being authenticated just one time. (See:
Kerberos.)
(C) Typically, a user logs in just once, and then is transparently
granted access to a variety of permitted resources with no further
login being required until after the user logs out. Such a system
has the advantages of being user friendly and enabling
authentication to be managed consistently across an entire
enterprise, and has the disadvantage of requiring all hosts and
applications to trust the same authentication mechanism.
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