Database developer platform MongoDB introduced a preview release of “Queryable Encryption.” According to its website, the product makes MongoDB "the only database provider that allows customers to run expressive queries, such as equality ... range, prefix, suffix, (and) substring ... on fully randomized encrypted data." Customers of MongoDB can "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." 
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