A US cyber war against Iran's nuclear program may have only just begun and could escalate with explosions triggered by digital sabotage, experts say.

Although the Iranian regime remains vulnerable to more cyber attacks in the aftermath of the "Stuxnet" worm that disrupted its uranium enrichment work, Tehran may be receiving help from Russian proxies for its digital security, some analysts say.

The nuclear program is "really not that well protected" from more digital assaults and Iran will be hard-pressed to safeguard its uranium enrichment efforts from tainted software, said David Albright, president of the Institute for Science and International Security.

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Source: AFP, NDTV