The US and Israel created the Stuxnet worm that is believed to have sabotaged Iran’s nuclear programme.
Ralph Langner, one of the first researchers to show the working of the sophisticated malware, said that he believes Mossad is involved, but the US is the leading source.
The worm first came into light late last year after studies showed a likelihood of a "nation state" to be behind the worm meant to target Iran’s nuclear programme.
Though Iran’s uranium enrichment programme is known to have been delayed, Iranian officials have denied that the virus caused any major delays to its nuclear power programme. However, they have admitted that the worm infected staff computers.
The origin of the worm is still unknown.
Langner said the US is the main driver behind the creation of the worm.
Langner said, "My opinion is that Mossad [Israel’s intelligence agency] is involved."
"There is only one leading source, and that is the United States."
Langner added the worm works by showing fabricated readings to trick human operators who think that the machines are working correctly, while the worm affects the processes. He also said that the developers had access to sensitive protected information.
Langner said, "It was engineered by people who obviously had inside information."
"They probably also knew the shoe size of the operator."
