The White House is
telling US agencies to create "insider threat" programmes to ferret out
disgruntled workers who may leak state secrets, reports say.
The move follows the leaking of thousands of secret US cables to the whistle-blowing website Wikileaks.
An 11-page memo by US intelligence officials detailing the advice has been published by US broadcaster NBC.
Correspondents say the Obama administration is trying to prevent more embarrassing disclosures.
Agency officials are being urged to find ways to "detect
behavioural changes" among those employees who might have access to
The memo suggests the use of psychiatrists and sociologists
to measure the "relative happiness" of workers or their "despondence and
grumpiness" as a way to assess their trustworthiness.
The document published by NBC
has been distributed by Jacob J Lew, director of the White House Office
of Management and Budget. It was sent this week to senior officials at
all agencies using classified material.
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The US is currently holding soldier Pte Bradley Manning on
suspicion of stealing classified documents and passing them to
US officials have not commented on the memo published by NBC.
The memo asks: "Do you have an insider threat programme or the foundation for such a programme?"
It also asks whether agencies are using lie-detector tests or
are trying to identify "unusually high occurrences of foreign travel,
contacts or foreign preference" by members of staff.
Wikileaks and its founder Julian Assange have faced strong
criticism for releasing thousands of cables between the US State
Department and diplomatic outposts around the world.