TUTORIAL 1 - SCR3443 Tutorial 1 Introduction to...

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SCR3443 Tutorial 1: Introduction to Cryptography 1. Which security service(s) are guaranteed when using each of the following methods to send mail at the post office? a. Regular mail b. Regular mail with delivery confirmation c. Regular mail with delivery and recipient signature d. Certified mail e. Insured mail f. Registered mail 2. Define the type of security attack in each of the following cases: i. A student breaks into a professor’s office to obtain a copy of the next day’s test. ii. A student gives a check for $10 to buy a used book. Later she finds that the check was cashed for $100. iii. A student sends hundreds of e mails per day to another student using phony return e mail address. 3. Which security mechanism(s) are provided in each of the following cases? a. A school demands student identification and a password to let students log into the school server. b. A school server disconnects a student if she is logged into the system for more than two hours.
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