Charlie Miller, the security researcher who has repeatedly developed exploits that take complete control of Macs, iPhones, and iPads, will be joining Twitter next week, the latest sign that the microblogging site is getting serious about security.

“Monday I start on the security team at Twitter,” the St. Louis, Missouri-based Miller wrote on Twitter. “Looking forward to working with a great team there!” Moxie Marlinspike, the pseudonymous cryptographer who has identified numerous security bugs in the SSL protocol used to secure website transactions, will be Miller’s boss, Miller said in an e-mail to Ars.

Members of Twitter’s press team didn’t respond to an e-mail seeking comment for this article.

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