An analysis of WeChat's network protocol MMTLS finds that it is a modified version of TLS 1.3 and WeChat developers' changes to its cryptography add weaknesses (The Citizen Lab)

The Citizen Lab:
An analysis of WeChat's network protocol MMTLS finds that it is a modified version of TLS 1.3 and WeChat developers' changes to its cryptography add weaknesses  —  Key contributions  — We performed the first public analysis of the security and privacy properties of MMTLS …