What is TDE and why do we use it in SQL Server?

Transparent Data Encryption (TDE) was introduced in SQL Server 2008. Its main purpose was to protect data by encrypting the physical files, both the data (mdf) and log (ldf) files (as opposed to the actual data stored within the database). Also, the TempDB database will be automatically encrypted.Click to see full answer. Also to know is, what is TDE and why do we use it?Transparent Data Encryption (often abbreviated to TDE) is a technology employed by Microsoft, IBM and Oracle to encrypt database files. TDE offers encryption at file level. TDE solves the problem of protecting data at rest, encrypting databases both on the hard drive and consequently on backup media. what does TDE protect against? Transparent Data Encryption (TDE) protects your data at rest by performing real-time I/O encryption and decryption of SQL Server database data and log files. One of the biggest benefits of TDE is that the SQL Server engine handles all of the encryption and decryption work. Similarly one may ask, how does TDE work in SQL Server? Transparent Data Encryption (TDE) encrypts SQL Server, Azure SQL Database, and Azure Synapse Analytics (SQL DW) data files, known as encrypting data at rest. One solution is to encrypt the sensitive data in the database and protect the keys that are used to encrypt the data with a certificate.What type of encryption does SQL Server use?SQL Server supports several symmetric key encryption algorithms, including DES, Triple DES, RC2, RC4, 128-bit RC4, DESX, 128-bit AES, 192-bit AES, and 256-bit AES. The algorithms are implemented using the Windows Crypto API.