In the fast-moving field of cybersecurity, where technologies evolve rapidly and hackers are constantly digging up new attack vectors, the missing ingredient all too often is common sense. That was the emphatic message that Roger Johnston, a member of the vulnerability assessment team at the Argonne National Laboratory, imparted to his audience in a keynote address here at the USENIX security conference. Johnston warned against a syndrome he described as "security theater," a condition in which enterprises might pay lip service to protecting their digital assets without addressing the root causes of security vulnerabilities.

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