Skype has announced something that some users have wanted for a long time: end-to-end encryption for conversations. Skype Insiders can preview the new encryption feature right now, and it’s called Private Conversations. With these conversations, end-to-end encryption for audio calls, text messages, images, audio files, and videos are now supported. 

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Source: Hot Hardware – Skype Unveils End-To-End Encryption To Secure Your Private Conversations