Securing SQL based databases with cryptographic protocols

A method operated on a computerizing system having a first server having a first database, a second server having a second database, the method comprising:

• generating two secret shares of at least some of the data fields in a database;
• encrypting at least some of the data fields in a database using a method based on probabilistic searchable encryption;
• loading the two secret shares generated from the data fields of the database and the encrypted data fields into the first database and the second database, wherein one secret share of the two secret shares is loaded into the first database and another secret share of the two secret shares is loaded into the second database and the encrypted data fields are loaded into the first database and the second database;
• receiving a request to perform a query in the database, wherein the query comprises an EQUALS clause;
• processing the query first via the EQUALS clause by filtering shares of the first database and the second database using the searchable encryption process independently;
• processing the rest of said query using a Multi-Party Computation (MPC) process performed on the secret shares held by the servers, wherein the database fields employed by the query process and the query results remain secret during the entire processing;
• and
• revealing the secret query results.