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As a database point person, I am required to encrypt SSN numbers wherever they are in a table. We use PostgreSQL. My application counterparts require that we use the AES-256-GCM encryption algorithm. However, I am not too sure how to apply that in postgresql.

After googling around, I am able to encrypt using either one of these two AES methods:

1.

UPDATE ssnTable
   SET encrypted_ssn = encrypt(encrypted_ssn::bytea, 'mykey', 'aes')`

2.

UPDATE ssnTable
   SET encrypted_ssn = pgp_sym_encrypt(encrypted_ssn, 'mykey', 'compress-algo=1, cipher-algo=aes256')

None of the above specifically uses the 'aes-256-gcm' algorithm, which is what I'm being asked to use. Any idea on how to use this algorithm on the column, in PostgreSQL?

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