Microsoft Office 365 email encryption could expose message content
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Security researchers at WithSecure have discovered it's possible to partially or fully infer the contents of encrypted messages sent through Microsoft Office 365, highlighting an intrinsic weakness in the encryption scheme used.
![](https://www.wisestamp.com/wp-content/uploads/2021/08/Step-3-Again-a-new-window-pops-up.-Check-the-box-labeled-Encrypt-message-contents-and-attachments.png)
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![](https://www.bleepstatic.com/images/news/u/1100723/2022/ECB_fail-1_WithSecure.png)
Microsoft Office 365 email encryption could expose message content
![](https://www.bleepstatic.com/content/hl-images/2022/02/02/Office_365.jpg?rand=73119820)
Microsoft Office 365 email encryption could expose message content
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