Lecture 13 - C lass Notes October 23, 2008 Web Bugs...

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Class Notes October 23, 2008 Web Bugs Internet Worm: Code Red Pixel tag, clear gif, one-by-one gif, invisible gif, beacon gif = hidden image on any document that can display html tags (e.g. web page) Bug is unseen but can track user behavior e.g. www.bluemile.com downloads web bug <img height = 1 width = 1 src = http://switch.avemea.com/action/bluemile_homepage/v2/a/AD7029944 > Places cookie on clients machine Cookie can be used to track client behavior Can be blocked through cookie blocking Basically used as a tracking device. Targeted Malicious Code Written for a particular purpose, particular operating system, particular application 1. Trapdoor – an undocumented entry point into a module. Legitimate trapdoors are installed in the development phase for testing. Software testing: (I) unit testing, (II) integration testing. Unit testing uses stubs and drivers that are later discarded. Tester also may insert debugging code. Some commands can cause problems if they are not removed after the testing
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This note was uploaded on 04/20/2010 for the course CECS 478 taught by Professor Englert during the Spring '10 term at CSU Long Beach.

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Lecture 13 - C lass Notes October 23, 2008 Web Bugs...

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