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Cybersecurity Threats and Solutions in the Digital Age

Learn about viruses, worms, robots, and SPAM threats and discover effective solutions to protect your systems. From virus spread prevention to SPAM message filtering, stay ahead in safeguarding your digital environment.

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Cybersecurity Threats and Solutions in the Digital Age

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  1. Pests • Viruses • Worms • Trojans • Illicit Servers • DoS • Robots • SPAM 1

  2. Viruses • Defn • Requires human action to spread • Infects most files on local computer • Doesn’t automatically spread across network • Carries payload (destructive or annoying messages) • Common MO • Macro attached to office document • Solutions • Fingerprint based (to detect viruses) • Application checksums (to detect tampering) 2

  3. Worms • Defn • Automatically spreads to other systems • MO • Protocol worms • Hybrid virus / worms • Solutions 3

  4. Robots • Threat: automatic creation of accounts • Paypal • Storage associated: Hotmail, Yahoo communities… • Adbots in chat rooms • Solutions • Turing tests • Distorted speech recognition • Overlayed distorted text recognition • CAPTCHA • Completely automated public turing test to tell computers and humans apart • http://www.captcha.net/ 4

  5. SPAM • Problem • Zero marginal cost of sending an email • Solutions • Brightmail • Dummy accounts • Correlate SPAM messages • Supply fingerprint to enterprise customers • Client refuses messages from unknown senders, until • They respond to a Turing test query • They execute a computationally expensive applet 5

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