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Article 21/07/2023 1 contributor
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Encryption is an important part of your file and information protection strategy. This article provides an overview of encryption for Microsoft 365. Get help with encryption tasks such as setting up encryption for your organization and password protecting Office documents.
What is encryption and how does it work in Microsoft 365?
The encryption process encodes your data (called plaintext) into ciphertext. Unlike plaintext, ciphertext cannot be used by people or computers until the ciphertext is decrypted. Decryption requires an encryption key that only authorized users have. Encryption helps ensure that only authorized recipients can decrypt your content. Content includes files, email messages, calendar entries, etc.
Encryption by itself does not prevent interception of content. Encryption is part of a larger information protection strategy for your organization. By using encryption, you help ensure that only authorized parties can use encrypted data.
You can have multiple layers of encryption in place at the same time. For example, you can encrypt e-mails as well as the communication channels through which your e-mails pass. With Office 365, your data is encrypted at rest and in transit, using multiple strong encryption protocols and technologies such as Transport Layer Security/Secure Sockets Layer (TLS/SSL), Internet Protocol Security (IPSec), and Advanced Encryption Standard (AES).
Encryption of data at rest and data in transit
Examples of data at rest include files you uploaded to a SharePoint library, Project Online data, documents you uploaded in a Skype for Business meeting, emails and attachments you stored in folders in your mailbox, and files you uploaded to OneDrive for Business.
Examples of data in transit include email messages being delivered or conversations taking place in an online meeting. In Microsoft 365, data is in transit whenever a user’s device communicates with a Microsoft server or when a Microsoft server communicates with another server.
With Office 365, multiple layers and types of encryption work together to secure your data. The following table includes some examples, with links to additional information.
Microsoft 365 Cryptographic Update
At the end of August 2023, Microsoft Purview Information Protection will start using Advanced Encryption Standard (AES) with a key length of 256 bits in Cipher Block Chaining (AES256-CBC) mode. By October 2023, AES256-CBC will be the default for Microsoft 365 Apps document and email encryption. You may need to take steps to support this change in your organization. For more information, see Encryption technical reference details.
What if I need more control over encryption to meet security and compliance requirements?
Microsoft 365 provides Microsoft-managed solutions for volume encryption, file encryption, and mailbox encryption in Office 365. Additionally, Microsoft provides encryption solutions that you can manage and control. These encryption solutions are based on Azure.
To learn more, see the following resources:
How do I… To complete this task View these resources Set up encryption for my organization Set up encryption in Office 365 Enterprise View details about certificates, technologies, and TLS cipher suites Technical details about encryption Work with encrypted messages on a mobile device View encrypted messages on your Android deviceView encrypted messages on your iPhone or iPad Encrypt a document using password protection. (Password protection is not supported in a browser. Use desktop versions of Word, Excel, and PowerPoint for password protection.) Add or remove protection in your document, workbook, or presentation. Choose an Add protection section, then see Encrypt with a password. Remove encryption from a document Add or remove protection to your document, workbook, or presentation. Choose a Remove Protection section, then see Remove Password Encryption.
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Sources 2/ https://learn.microsoft.com/en-us/purview/encryption The mention sources can contact us to remove/changing this article |
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