(Reuters) -- Millions of Iranians have suffered serious disruption recently in accessing email and Internet social networking sites, raising concerns authorities are stepping up censorship of opposition supporters ahead of parliamentary elections next month.
Iranians have grappled with increased obstacles to using the Internet since opposition supporters used social networking sites to organize widespread protests after the disputed 2009 re-election of President Mahmoud Ahmadinejad.
The country is preparing to hold parliamentary elections on March 2, the first time Iranians will go to the polls since President Ahmadinejad's disputed re-election. The government denied any fraud in the vote, which ignited street protests that were crushed violently by security services after eight months.
The new Internet blockade affected the most common form of secure connections from Friday, according to outside experts and Iranian bloggers. Traffic was said to have returned to normal on Monday. "I haven't been able to open pages for days but now it's working again, although slowly," said Hamid Reza, a 20-year-old student in Tehran, who was reluctant to give his surname.
The cut-off appeared to target all encrypted international websites outside Iran that depend on the Secure Sockets Layer protocol, which display addresses beginning with https, according to Earl Zmijewski of Renesys, a U.S. company that tracks Internet traffic worldwide.
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Google, which uses SSL for its Gmail service, reported that traffic from Iran to its email system fell precipitously.
Iran's Ministry of Communications and Technology denied knowing of the disruption, saying the origin was elsewhere.
"The government is testing different tools," said Hamed Behravan, who reports on Iranian technology issues for the U.S. government-funded Voice of America. "They might have wanted to see the public reaction."
NATIONAL INTERNET SYSTEM?
Many Iranians are concerned the government may be preparing to unveil its much documented national internet system, effectively giving the authorities total control over what content Iranian users will be able to access.
The authorities say it is designed to speed up the system and filter out sites that are regarded as "unclean."
"The Internet is an uninvited guest which has entered our country," said Mohammad Reza Aghamiri, a member of the Iranian government's Internet filtering committee, "and because of its numerous problems, severe supervision is required."
He told the daily Arman that Internet search engines like Google were a threat to the country.
"We have never considered Google as appropriate to serve Iranian users, because Google is at the service of the CIA," he said. "It has adopted a vivid hostile stance against us."ble.
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