The Rijndael and RijndaelManaged types in .NET have been replaced by the more secure and efficient AesManaged type since September 2021. It is advised to use AesManaged instead of RijndaelManaged for AES encryption due to better compatibility and support for required block and key sizes. The provided code example demonstrates the usage of both encryption algorithms, and it is crucial to stay updated with secure algorithms to avoid potential fines during security audits.
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