- December 3, 2013: Google finds fraudulent certificates for Google domains, signed by ANSII. The certificates are used for MITM attacks. (source)
- March 3, 2015: An intermediate CA operating under CNNIC (named MCS Holdings) is found issuing fraudulent certificates for various Google domains, for the purpose of MITM attacks. This delegation should have never occurred, as MCS Holdings was not fit to hold this kind of authority. (source)