computer science :In cryptography, $\_\_\_\_\_\_\_$ is a type of attack where an attacker attempts to gain unauthorized access by submitting numerous passwords or keys, while $\_\_\_\_\_\_\_$ is a cryptographic technique that converts plaintext into ciphertext.

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In database management systems, $\_\_\_\_\_\_\_$ is a language used to manipulate and query data stored in a relational database, while $\_\_\_\_\_\_\_$ is a language used to define the structure and integrity constraints of a database.