 Two-Party Authentication  One-Way Authentication  Two-Way Authentication  Third-Party Authentication  Kerberos  X.509  Single Sign ON  User can access several network resources by logging on once to a security system. AUTHENTICATION: PROCEDURE  Authentication procedure.What, for example, can a user do once authenticated? Can they figure the device or only see data.

 FUNCTIONAL AUTHORIZATION  Concern with individual user “rights”.

Usually we consider these in the form of a “User Account”. GENERAL ACCESS AUTHENTICATION  To control whether or not a particular user has ANY type of access right to the element in question. Verifying the identity of a user  Typically based on  Something user knows  Password  Something user have  Key, smart card, disk, or other device  Something user is  fingerprint, voice, or retinal scans  UserID can be one or combination of the following:  User Name  User Student Number  User SSN  Sometimes users can select their ID as long as it is given too another user.

IDENTIFICATION  Something which uniquely.

 Provide authentication and access control for resources  Ex: AFS  Guarantee availability of resources  Ex: 5 9’s (99.999% reliability)

 Protect vital information while still allowing access to those who need it  Trade secrets, medical records, etc.  Network security covers a variety of computer networks, both public and private, that are used in everyday jobs conducting transactions and communications among businesses, government agencies and individuals.  Network security involves the authorization of access to data in a network, which is controlled by the network administrator.

Network security consists of the provisions and policies adopted by a network administrator to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. However, as more and more people become ``wired'', an increasing number of people need to understand the basics of security in a networked world. A complicated subject, historically only tackled by well-trained and experienced experts.

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