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Iran is unveiling a nationwide "Halal Intranet" this spring that will try to seal the nation off from the corrupting influences of Google, Facebook, and Twitter. But can it work

With the launch of a “national” more censored version of the Internet only a few weeks away in Iran, users are already reporting increasingly limited access to certain Web sites and Web security features. A number of Internet users in Iran have for the past few days reported difficulty connecting to Web sites housed on servers outside of that country, as well as blocked access to sites such as Google and Yahoo, and to any encrypted Internet traffic, according to Iran Media Program , a project of the Center for Global Communication Studies at the Annenberg School for Communication, University of Pennsylvania. The timing coincides with potential protests to mark the first anniversary of the house arrest of lead opposition candidates Mir-Hossein Mousavi and Mehdi Karroubi.

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Introducing a nationwide intranet that one high-ranking official calls a "Halal Internet." In: censorship and e-banking. Out: sex and profanity. The Iranian government, wary from the internet-driven 2009 demonstrations and the recent Arab revolutions, is planning to wall-off much of the country's online access.