Chinese government-backed hackers have attacked major telecoms businesses throughout the world in a cyber-espionage effort that has lasted at least two years and has successfully compromised at least 13 telecommunications groups.   In a recent advisory, the FBI, NSA and CISA stated that hackers linked to the People’s Republic of China (PRC) had targeted and hacked major telecommunications businesses by exploiting simple and well-known network and system vulnerabilities.   According to the report, Chinese espionage is often initiated with hackers surveying target networks and exploring the manufacturers, models, versions, and known vulnerabilities of routers and networking equipment using open-source scanning tools such as RouterSploit and RouterScan. The Chinese government consistently disputes charges of hacking.   The statement from the American security agencies did not name the victims of the hacking, nor did it specify the extent of the damage. However, US authorities did list specific networking equipment, such as routers…