A Swiss newspaper, Der Tagesanzeiger, reported that cyber hackers had snooped on all the negotiations between the P5+1 world powers and Iran.
The paper said Swiss investigators found that cyber attackers infiltrated surveillance cameras at the hotels hosting the Iran talks. The hackers used a highly sophisticated $50 million Trojan program, almost certainly developed by the Israeli secret service.
Israel opposed the nuclear agreement, aimed at lifting sanctions against Iran in exchange for curbing Tehran's nuclear program.
However, before the landmark deal was reached on July 12, Swiss security agents raided a Geneva hotel where some talks were held, and found evidence of what they suspected was Israeli cyber spying.
The security services were tipped off last spring after an anti-virus software manufacturer, Moscow-based Kaspersky Lab, detected a hack on several of its computers in luxury hotels across Europe.
Switzerland's chief federal prosecutor opened an official investigation into the cyber attacks on May 6.
A week later, cyber crime authorities raided the President Wilson hotel. Preparing the raid had been difficult because some of the hotel's security staff had previously worked for the Israeli secret services, Der Tagesanzeiger reported.
Authorities confiscated software showing the use of a sophisticated surveillance program known as Duqu 2, similar to the Duqu Trojan known to have been used by Israeli intelligence.
The cyber attackers reportedly used the Trojan to access the hotel's surveillance cameras and microphone systems. The Trojan was also used to infiltrate the same systems at another hotel in Switzerland where nuclear talks were held.
Although Swiss cyber crime police still suspect the Israelis of widespread spying on the Iran negotiations, federal prosecutors reportedly will have a tough time proving the allegations.
