SQLCipher

SQLCipher is an open-source extension to SQLite that adds transparent 256-bit AES encryption of database files. It allows developers to protect sensitive data stored within SQLite databases by encrypting the entire database file. The encryption is handled transparently, meaning that applications interact with the database as they normally would using standard SQL commands, without needing to explicitly encrypt or decrypt individual data points.

The primary benefit of SQLCipher is enhanced data security. When a database file is encrypted, it becomes unreadable to anyone who does not possess the correct decryption key. This is particularly useful for applications that handle personal, financial, or other confidential information, especially on mobile devices where physical access to the device might be a concern. SQLCipher supports various platforms including iOS, Android, macOS, and Windows, making it a versatile solution for cross-platform development.

Key features of SQLCipher include strong AES encryption with a 256-bit key, support for various cryptographic modes, and integration with existing SQLite applications with minimal code changes. Applications can be configured to encrypt a database upon creation or to encrypt an existing unencrypted database. The decryption key must be provided by the application at runtime to access the encrypted data. This ensures that even if the database file is exfiltrated, the data remains protected without the key.