Queryable Encryption` is a new feature in MongoDB that allows customers to encrypt sensitive data from the client side, store it as fully randomized encrypted data on the database server side, and run expressive queries on the encrypted data. This feature provides rich querying capabilities on encrypted data, such as equality, range, prefix, suffix, substring, and more, making it a huge advantage for organizations that need to secure their data while running expressive queries. Queryable Encryption was designed by MongoDB's Advanced Cryptography Research Group and is available in preview release. It adds another layer of security for sensitive data throughout its lifecycle, strong technical controls for critical data privacy use cases, faster application development, and reduces institutional risk for customers migrating to the cloud.