The implications of San Francisco computer network administrator’s reckless and enigmatic decision to change all security passwords and keep them all for himself could turn bad if IT experts won’t soon manage to take back network control.Terry Childs, 43, pleaded not guilty in San Francisco Superior Court, after being arrested on July 13 for computer tampering. He will remain in police custody on $5 million bail, while his next bail hearing is scheduled for July 23.

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