Conceptual computer artwork of a human eye, electronic circuit diagrams, a bar code
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Can physical systems be hacked?

9 July 2012 Last updated at 13:42 BST

With the Olympic Games almost upon us, security around potential terrorist targets is being strengthened. But is our infrastructure vulnerable less to physical assault than to cyber-attack?

A new search engine reveals that a large number of physical systems ranging from webcams to forensic lab heating systems are connected to the internet.

The World At One's Chris Vallance reports.