Client-side encryption
While most modern database management systems offer robust security mechanisms to protect data at rest and in-transit, few have managed to address the need to protect data at the granular level of the field within a record. This is the gap that MongoDB seeks to fill with Client-Side Field Level Encryption (CSFLE).
CSFLE represents a sophisticated approach to security, allowing applications to encrypt specific document fields in a collection before sending that data to MongoDB. With this technique, the encryption and decryption processes take place exclusively on the client side, ensuring that the database server never has access to clear text data. Sensitive data is not only stored securely, but also handled and processed with the highest degree of protection. Thus, even in a hypothetical scenario of a total database compromise, even though an attacker could obtain encrypted data from sensitive fields, they would not have the keys or the necessary context...
