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What encryption algorithms are available for TDE transparent encryption?

Created on 2025-07-11 15:50:16
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For Transparent Data Encryption (TDE), several encryption algorithms are commonly available to secure data at rest. The specific algorithms depend on the database system or platform, but widely supported options include:

  1. AES (Advanced Encryption Standard) – The most common choice, with key sizes of 128-bit, 192-bit, or 256-bit. AES is fast and secure, making it ideal for TDE.

    • Example: A database encrypts its data files using AES-256, ensuring that even if storage media is stolen, the data remains protected.

  2. 3DES (Triple DES) – An older algorithm that applies DES three times for stronger security, though it is slower and less efficient than AES.

    • Example: Legacy systems might still use 3DES for compatibility, though AES is preferred for new deployments.

  3. SM4 (Chinese Commercial Cryptography Standard) – Used in regions requiring compliance with Chinese cryptographic regulations.

    • Example: A financial institution in China uses SM4 for TDE to meet local data security laws.

For cloud-based TDE, Tencent Cloud provides TDE with AES-256 support for databases like TencentDB for MySQL, PostgreSQL, and SQL Server, ensuring strong encryption for sensitive data.