Iran calls it the "soft war" with the West: Battles to control, defend and monitor the Internet and other high-level telecommunications. The latest move came quietly when the powerful Revolutionary Guard recently launched what it claims is a hack-proof communications network for its high-level commanders.

Largely overshadowed by the showdowns over Iran's nuclear program, the efforts to build a cyber-fortress have become a priority among leaders fearful of Internet espionage and virus attacks from abroad and seeking to choke off opposition outlets at home.