Skype has been MITM'ing chats and even other https links for a long time: http://arstechnica.com/security/2013/05/think-your-skype-messages-get-end-to-end-encr

Skype has been MITM'ing chats and even other https links for a long time: http://arstechnica.com/security/2013/05/think-your-skype-messages-get-end-to-end-encryption-think-again/ http://arstechnica.com/security/2013/05/think-your-skype-mes... https://www.eff.org/deeplinks/2013/07/why-doesnt-skype-include-stronger-protections-against-eavesdropping https://www.eff.org/deeplinks/2013/07/why-doesnt-skype-inclu...