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Previous episode Session cookies: how a website remembers that you are logged in

How passwords and logins work: why a website should not know your password

Session hijacking: what a thief can do with a stolen login cookie

You have a strong password, a code on your phone and a passkey. A thief can still get past all of them. He only needs one small file that your browser keeps: a cookie you never see.

  1. 1 A free training plan for climbers lands in your inbox, and you open the file. It is a program in disguise, and it starts running on your laptop.youclimbingtraining planFree training plan!

    A free training plan for climbers lands in your inbox, and you open the file. It is a program in disguise, and it starts running on your laptop.

  2. 2 You see nothing happen. The program copies the cookies of your browser and sends them to Rono.your laptopRono's laptop

    You see nothing happen. The program copies the cookies of your browser and sends them to Rono.

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