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CSE 91 - UCSD CSE CS 91 Perspectives in Computer Science...

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UCSD CSE CS 91 Perspectives in Computer Science Homework Assignment 2 Due: Thursday, October 15th Directions: Collaborate with the same group members you had before. Problems take long to read but can be answered very concisely (all in a few lines). They are meant to make you think. Don’t worry if you can’t solve them all, but put down your ideas. Write up your solutions as a PDF file and follow the instructions from last time to upload your homework. 1. Computer Security: Stefan Savage’s lecture on security was on spam but was prefaced by a statement that “security is not extra functionality but an attitude towards any functionality. We must think the way the bad guy thinks and see how her or she could misuse the system and then look for countermeasures”. For example, you may be tempted to leave your keys in the ignition and jump out of the car to buy a burger with your door unlocked. However, realizing a bad buy could drive off with your car makes you want to lock the car. Similarly, we want you to try and work through some implications of this statement for the following two computer examples. A. Email security: Lets assume you have a secure password to your Gmail account. However, you tend to keep your computer on in your dorm room and leave the email on the screen.
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