The fears stem partly from China's 2017 National Intelligence Law which states that Chinese organizations must " support, cooperate with, and collaborate in, national intelligence work", but the Chinese firm has denied all claims that its products present a security risk.
The company said at the time that it would keep Huawei as an "important equipment provider outside the core network", using its equipment in areas that are considered "benign", such as masts or towers. We would not do this in any country, ' Mr Ding said. "Were Huawei ever to engage in malicious behavior, it would not go unnoticed - and it would certainly destroy our business".
July's report identified what it called technical problems which limited security researchers' ability to check internal product codes and concerns about the security of third-party components from a US supplier. We choose to ensure security'.
"Enhancing our software engineering capabilities is like replacing components on a high-speed train in motion", the letter stated.
'It is a complicated and involved process and will take at least three to five years to see tangible results.
Huawei, the world's biggest telecoms equipment maker, is facing worldwide scrutiny over its ties with the Chinese government and allegations that Beijing could use its technology for spying, which Huawei denies.
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United Kingdom telecoms group BT has seen no evidence that technology from China's Huawei poses a security risk.
Huawei, the global networks market leader with annual sales exceeding $100 billion, faces worldwide scrutiny over its ties to the Chinese government and suspicion Beijing could use its technology for spying.
Finland's Nokia is said to be even further behind.
In the UK, Huawei is a key partner for many telcos and is already subject to monitoring by a specialist unit.
China accused the United Kingdom of "deep-rooted pride and prejudice" in response to Mr Williamson's comments last December.
Jan 15. 2019: Daryl Godfrey, SaskTel's chief technology officer, speaks to reporters about SaskTel's involvement with Huawei, and his confidence that SaskTel's Huawei equipment is safe and properly tested. Last month, the US Department of Justice charged the Chinese company with trying to steal a robot design from T-Mobile and attempting to sidestep US sanctions on Iran.