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How come Facebook is so secure but Twitter is not?

news.ycombinator.com

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Re: How come Facebook is so secure but Twitter is not?

#2
Speculation: some of Twitter is still written in Ruby (I know they are rewriting their Ruby into Java, but don't know whether they've completed that yet), and the attackers got in using one of the recent Ruby exploits.

Whereas Facebook don't use Ruby (afaik they use their own custom PHP implementation).