Many parts of Facebook such as chat, messaging and posting statuses are written in Javascript/AJAX. This requires a lot of calls to the server to constantly have the most up-to-date information. To speed things up, Facebook stores some of the AJAX data in temporary files on the person's computer. These files can contain valuable forensic data. In particular, Facebook stores some chat messages in individual files. I say some because caching may not be invoked if the person does not move away from the Facebook homepage at all.  However any movement to other Facebook pages should cause the caching.

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So I started my thesis 'officially' yesterday, after being told we all were allowed to proceed to masters following the exam board meeting. No actual results posted up yet, but hopefully I did well!

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