How does encryption work in SQL Server?

Question

In SQL Server, encryption keys include a combination of public, private, and symmetric keys that are used to protect sensitive data. This section explains how to implement and manage encryption keys. 11 июн. 2021 г.

How does SQL encryption work?

The encryption uses a database encryption key (DEK). The database boot record stores the key for availability during recovery. The DEK is a symmetric key. It's secured by a certificate that the server's master database stores or by an asymmetric key that an EKM module protects.

How does SQL Server store encrypted data?

To set up column-level encryption with the help of SQL Complete, we'll perform the following steps:1Create a new database and a table.2Insert columns with values into the table.3Retrieve data from the table.4Create a column master key.5Create a column encryption key.6Encrypt columns for the created table.

How encrypt and decrypt data in SQL Server?

The following steps detail how this process occurs within SQL Server:1A database master key is created.2A self-signed certificate is created which will be protected by the database master key.3A symmetric encryption key to be used for the column level encryption is created from the certificate.

How does encryption work step by step?

Encryption uses complex mathematical algorithms and digital keys to encrypt data. An encryption algorithm (cipher) and an encryption key encode data into ciphertext. Once the ciphertext is transmitted to the recipient, the same or different key (cipher) is used to decode the ciphertext back into the original value.

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