English to Chinese Tech/Engineering IT (Information Technology) encryption

A database that needs protection typically requires field-level encryption. It can be encrypted on a per-column or per-row basis, but it’s usually preferable to encrypt data per element. Essentially all the data stored in a database table is encrypted before being stored in the database and is then decrypted on the fly. This presents additional challenges for indexing and queries, and for that reason, those mechanisms have to be privy to the field-level encryption routines used to store the data.