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Caching-sha2-password.dll
: It uses SHA-256 hashing for password verification, making it resistant to rainbow table attacks and brute-force attempts compared to the legacy mysql_native_password method.
The older mysql_native_password utilized SHA-1 hashing. While not yet broken for practical preimage attacks, SHA-1 is considered cryptographically weak and deprecated by NIST. caching-sha2-password.dll utilizes SHA-256, which is currently the industry standard for password storage integrity. caching-sha2-password.dll
Older applications (e.g., those using PHP 5.x or old .NET MySqlConnector versions) do not support caching_sha2_password . When they connect to a MySQL 8.0 server, they throw: : It uses SHA-256 hashing for password verification,
Remember: treat this DLL as you would any system-critical database file. Do not move, rename, or delete it without understanding the consequences. When in doubt, a full backup followed by a repair installation of MySQL Server will restore the correct version of caching-sha2-password.dll and resolve most related errors. caching-sha2-password
The DLL manages an internal cache with the following characteristics:
: It provides a more secure SHA-256 hashing mechanism than previous versions while maintaining performance by caching authentication credentials on the server.
MySQL exposes several variables that control or interact with this DLL: