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White Paper

Guide to MongoDB Client-Side Field Level Encryption


MongoDB’s Client-Side Field Level Encryption (FLE) provides amongst the strongest levels of data privacy and security for regulated workloads. It protects your data without:

  • Developers needing to write additional, highly complex encryption logic.
  • Compromising your ability to query encrypted data.
  • Significantly impacting database performance.

Sensitive fields are automatically encrypted by the MongoDB drivers before leaving the application, and so the database server only ever works with it as ciphertext. Client-Side FLE protects data while it is in-use by the database, securing it against sophisticated exploits that target server memory. It also makes it much easier for you to comply with “right to erasure” mandates in modern privacy regulations.

Download the Guide to learn more and get started with Client-Side FLE.


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