Scenes from this year’s hacking conference in Las Vegas, Nev. include a keynote by General Keith B. Alexander, Director of the National Security Agency and talks by researchers Karsten Nohl and Ralf-Phillip Weinmann.

Ryan McGeehan, the director of incident response at Facebook and Chad Greene, the manager of the Facebook CERT on Thursday both explained how the social network has planned red team exercises in the past to prepare the company’s security team for a real attack.

Stefan Esser

Mobile security researcher Stefan Esser discussed the security model of Apple iOS and some of the recent changes the company has made to lock it down even further.

Chaouki Bekrar

The team from French research firm VUPEN, including CEO Chaouki Bekrar, has dominated the Pwn2Own hacking contest, taking down several targets, including Internet Explorer 10, Java and Mozilla Firefox. They plan to attack Adobe Flash on Thursday.

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