There are reports of China stepping up electronic communications censorship beyond e-mail and the Internet in the form of “policing cellphone calls” Two callers, one speaking English and the other Chinese, have reported being cut off mid-sentence after saying “protest” There have been concerns in the past about if Skype had a back door for eavesdropping. Privacy International (PI) recently asked Skype to improve the security of its VoIP service to protect users’ privacy. PI believes Skype users are vulnerable to interception, impersonation and surveillance.”]
Source: https://www.csoonline.com/article/2228860/is-skype-a-security-risk-that-endangers-your-privacy-.html