Nearly three months after a report detailed an extensive, worldwide cyber espionage operation, many countries that were hacked may not have been formally notified yet. Legal barriers have hampered efforts to contact many countries whose computers in embassies and ministries of foreign affairs were infected with malicious software capable of stealing data, said Nart Villeneuve, one of the authors of a detailed 53-page report that shed new light on the extent of cyber spying.

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