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Update your browser! It's the most important thing people should do to stay secure. Update your OS, and other software as well.

Mallory tries to create a phishing site to lure Alice into revealing her secrets.

Mallory tries to create a browser extension that will let him spy on Alice.

Alice and Bob use TLS to keep their long distance relationship hot and private.

Alice and Bob use VPN to fight Mallory, an inquisitive sysadmin.