BEIJING (Reuters) - Technology companies have nothing to fear from China’s new anti-terrorism law which aims to prevent and probe terror activities and does not affect their copyright, China’s Foreign Ministry said on Wednesday, rebuffing U.S. criticism as unwarranted.

A magnifying glass is held in front of a computer screen in this picture illustration taken in Berlin May 21, 2013. REUTERS/Pawel Kopczynski

The draft anti-terrorism law has caused concern in Western capitals as it could require technology firms to install “back doors” in products or to hand over sensitive information such as encryption keys to the government.

The law is currently having another reading at the latest session of the standing committee for China’s largely rubber-stamp parliament, the National People’s Congress, which ends on Sunday.

This week, the U.S. State Department said it had expressed “serious concerns” to China about the law which would do more harm than good against the threat of terrorism.

Chinese Foreign Ministry spokesman Hong Lei said he was “dissatisfied” with the U.S. position and hoped they respected China’s law-making process and did not adopt “double standards”.

China faced a serious threat from terrorism and needed to improve its legal framework to deal with the problem, Hong added.

“What we are doing is reasonable and fair,” he said.

Terrorists had been using the Internet to operate and China needed laws to cope with this, Hong added.

“While formulating this law, we referred to the laws of other countries, including the United States,” he said, pointing to the U.S. Communications Assistance for Law Enforcement Act, a wiretapping law.

“The draft of our anti-terrorism law mandates the obligation of telecommunications operators, Internet servers and service providers to assist public and state security organ in stopping and probing terrorist activities,” Hong added.

“This is both totally rational and necessary. This rule won’t limit the lawful operations of companies, does not provide a ‘back door’ and will affect neither the firms’ intellectual property nor Internet users’ freedom of speech.”

Officials in Washington have argued the law, combined with new draft banking and insurance rules and a slew of anti-trust investigations, amounts to unfair regulatory pressure targeting foreign companies.

China’s national security law adopted in July requires all key network infrastructure and information systems to be “secure and controllable”.

The U.S. has also said the new law could restrict freedom of expression and association.

Hong said China paid great attention to the relationship between fighting terrorism and protecting human rights and would ensure people’s legal rights are protected.

Officials say China faces a growing threat from militants and separatists, especially in its unruly Western region of Xinjiang, where hundreds have died in violence in the past few years.

Rights groups, though, doubt the existence of a cohesive militant group in Xinjiang and say the unrest mostly stems from anger among the region’s Muslim Uighur people over restrictions on their religion and culture.