By Reuters Staff Slideshow ( 5 images ) PHNOM PENH (Reuters) - Human rights groups decried Cambodia’s establishment this week of a China-style internet gateway that would allow all online traffic to be controlled and monitored, saying it would be a new tool for longtime leader Hun Sen to repress any opposition “Prime Minister Hun Sen struck a dangerous blow against internet freedom and e-commerce in Cambodia by expanding the government’s control over the country’s internet,” Phil Robertson, deputy Asia director at Human Rights Watch, said on Thursday. “Cambodia’s National Internet Gateway is the missing tool in the government’s toolbox for online repression,” he said in a statement.