DCE
Short for Distributed Computing Environment, a suite of technology services developed by The Open Group for creating distributed applications that run on different platforms. DCE services include:
# Remote Procedure Calls (RPC)
# Security Service
# Directory Service
# Time Service
# Threads Service
# Distributed File Service
DCE is a popular choice for very large systems that require robust security and fault tolerance.
Kerberos
An authentication system developed at the Massachusetts Institute of Technology (MIT). Kerberos is designed to enable two parties to exchange private information across an otherwise open network. It works by assigning a unique key, called a ticket, to each user that logs on to the network. The ticket is then embedded in messages to identify the sender of the message.
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