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FFW,e HUV ;.HUV 3Ge HUV ;05+HUV 22l H$ ;1H$ 5Ge H$ ;33H$ 44l HHˆ;4HHˆ##7 h$Outline for  April 4, 2000 `Greetings and Felicitations `Review general information D`Basic components 1P`Confidentiality 2` Integrity 3` Availability 4v`Threats 5` snooping 6` modification 7`'masquerading; contrast with delegation 8`repudiation of origin 9`denial of receipt :`delay ;`denial of service <ت`Role of policy =䪛`.example of student copying files from another >`-emphasize: policy  defines  security ?`)distinguish between policy and mechanism @ `Goals of security A` prevention B` detection C` recovery D<`Trust EH`.hammer this home: all security rests on trust !F ffirst problem: security mechanisms correctly implement security policy; walk through example of a pro@1gram that logs you in; point out what is trusted G`Bsecond problem: policy does what you want; define secure, precise Hz`%Operational issues; change over time I`cost-benefit analysis J`4risk analysis (comes into play in cost-benefit too) K`laws and customs L`Human Factors M`organizational problems AN`-people problems (include social engineering) HHˆ;6HHˆ66 l}?H >9D!9?H FGWQe- }H >;D8H FGWRe }? >=DKG? 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