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(CNN) —  

Several U.S. officials tell CNN the Obama administration does not doubt reports accusing Israel of using a new virus to spy on the Iran talks, but also do not believe there has been any data breach.

The Duqu virus cited in the Kaspersky report, and echoed in a subsequent report by Symantec, is believed by the U.S. to be an updated version of a virus traced to Israel. Kaspersky and Symantec are both cybersecurity firms.

However, the officials said they do not believe the virus infiltrated any U.S. computers, because the U.S. does not use hotel computer systems, instead using its own secure network to communicate with Washington.

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“We don’t use unsecure hotel computer systems, so if that is what they infiltrated, they would not be able to get anything from us,” one official said. “We always set up our own secure systems when we hold meetings at hotels, and that is true no matter where we are.”

However, the U.S. does believe that Israel has been spying on the U.S. and all of the other participants involved in the talks.

“They do it all the time,” another official said. “They did it last year, and they did it again this year. This doesn’t come as any great surprise to anyone.”

Israeli officials suggested in February that it had intelligence about negotiations among world powers on the framework Iran deal shaping up, although it would not admit to spying on the talks.