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In this lecture review for COMP101, we delve into the essential aspects of email privacy, including potential faking of email headers and the dangers of data tampering. We also cover the World Wide Web, discussing common browsers, URLs, HTML, and HTTP. In addition, we explore cookies and their role in tracking user behavior, along with security measures like HTTPS. Students are reminded to prepare for the upcoming test, engage with course materials, and complete assignments on time. Additionally, insights are shared on a project focusing on spam email filtering.
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COMP101 –Exploring Multimedia and Internet Computing LA1B (Fri 11:00 – 12:50) TA: Jackie Lo
Lecture Review • Email • Header (e.g. sender information, Date, etc.) are supplied by the system (but could be faked). • Privacy on e-mails • “hops” (servers and routers) between mail sender and recipient can read and store the IP packet send through them • there is no trace for tampering
Lecture Review • Email Privacy
Lecture Review • Using PKI at HKUST • E-cert, we got last lab • Exchange the public keys • Safeguard your private key • Email abuse • Questions? • My FYP is about tailor-made spam email filter. If you are interested, you can come and find the details in my office.
Lecture Review • World Wide Web (WWW) • Browser • Tool for browsing the web, e.g. IE, Netscape • Uniform Resource Locator (URL) • Address of webpage • Hyper Text Markup Language (HTML) • Common Language (Code) presenting webpage • Hyper Text Transfer Protocol (HTTP) • Protocol for transfer webpage
Lecture Review • Cookies • small files placed by Web server in a directory of the user’s computer • to track users’ browsing habits. • Security using the web • Use secure connection (https) before entering personal data. (A golden lock at the bottom of the browser)
Reminders • Test 1 will be on 27 Sept. (Next Wed!!!) • Please revise ALL the course materials. • Lecture Slides • Lab Notes and Assignment • Lecture Notes (Please at least read once!) • Homework 1 released • Please start working on it early. • Email me if you got any questions.
Lab 3 • Follow the steps in lab 3 • Notes for using excel function • =VLOOKUP(Lookup_value, Table_array, Col_index_num) • =IF(condition, return_if_true, return_if_false) • =COUNT(range) • =COUNTIF(range,criteria)