In fact, OpenBSD is so secure that it was once banned for use in a DEF CON competition, where crackers go after each other's systems.

事实上，OpenBSD是如此的安全，以至于在DEF CON竞赛中曾一度禁止使用它，在这个竞赛中，破解高手们对所有其他的系统进行攻击。

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She was in Las Vegas for the eighth annual Def Con conference where she gave a talk on among other things, search and seizure laws.

FORBES: The Lawyer Hackers Call

Days before that she gave a talk on legal issues faced by Internet service providers (ISP) at the Black Hat Briefings, a more serious set of meetings for security professionals and law enforcement officials that precedes the more festive Def Con.

FORBES: The Lawyer Hackers Call

The NSA director, General Keith Alexander, is coming under scrutiny after he told a crowd gathered at the Def Con hacker conference that the spy agency "absolutely" does not collect data from and maintain files on American citizens.

ENGADGET: Former NSA official says agency collects Americans' web data, director denies charges