Why doesn't decryption work?

Question

C++ / C#

var decodedData = System.Security.Cryptography.ProtectedData.Unprotect(encryptedData, null, System.Security.Cryptography.DataProtectionScope.CurrentUser);

This line produces an error:

An unhandled exception of type 'System.Security.Cryptography.CryptographicException' occurred in System.Security.dll
Additional information: Параметр задан неверно.

Answer 1

Try the example code. Perhaps you added some parameter when encrypting.
https://docs.microsoft.com/ru-ru/dotnet/api/system...