Hello @Petchiammal Rajumayandi ,
Welcome to Microsoft Q&A!
RijndaelManaged Class Method supports .NET Standard 2.0, 2.1, you can use it to encrypted string in UWP app.
You can follow the code sample in the official document.
- Create an
RijndaelManaged
object with the specified key and IV. - Create a decryptor to perform the stream transform.
- Create the streams used for decryption.
- Read the decrypted bytes from the decrypting stream and place them in a string.
Thank you.
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