> All Skype-to-Skype voice, video, file transfers and instant messages are encrypted. > For instant messages, we use TLS (transport-level security) to encrypt

> All Skype-to-Skype voice, video, file transfers and instant messages are encrypted. > For instant messages, we use TLS (transport-level security) to encrypt your messages between your Skype client and the chat service in our cloud [...] As expected, it's just network-level encryption, not end-to-end encryption.