Deputy Prime Minister Wong Kan Seng, who is also the interior minister, said the city-state would increasingly use science and technology for checks on incoming travellers.

"A major project in the pipeline is the setting up of a Human Factors laboratory at the land checkpoints to apply biometrics, behaviour profiling and bio-signal analysis," he told an international conference on homeland security.

Singapore will explore whether biological data, including gait and skin texture, "can be used to verify and identify the travellers of security interest with a higher order of certainty," Wong said.

The alleged ringleader of a terror cell in Singapore, Mas Selamat bin Kastari, escaped from a tightly guarded facility here in February 2007 and is still at large. Police say he sometimes walks with a limp.

More than 150 exhibitors from over 20 countries are attending this year's Global Security Asia (GSA) conference and exhibition, organisers said.

Andrew Marriott, managing director of event organisers GSA Exhibitions Pte Ltd, cited one estimate showing that homeland security expenditure in the Asia-Pacific region will rise from the current 20 billion dollars a year to more than 36 billion dollars by 2014.

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Washington, April 29, 2009
At the height of the Cold War, a U.S. Army corps commander in Europe asked for information on his Soviet opposite, the commander of the corps facing him across the inter-German border. All the U.S. intelligence agencies, working with classified material, came up with very little. He then took his question to Chris Donnelly, who had a small Soviet military research institute at Sandhurst in the United Kingdom. That institute worked solely from open-source, i.e., unclassified, material. It sent the American general a stack of reports 6 inches high, with articles by his Soviet counterpart, articles about him, descriptions of exercises he had participated in and other valuable material.