* Roelof Temmingh & Andrew Macpherson gave a very good workshop on how to extend the excellent open source intelligence tool Maltego to include your own custom functions. Most security researchers should be familiar with Maltego already, but may not be aware that it is possible to customize it to your own needs. Want to write a tool to map people on a particular social networking site to their email address, or map a domain to some other information based on some internal company database you control? Well Maltego is definitely worth a look here
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