How Can I Decode a Base64 String After XOR and UTF-8 Encoding?

Decoding a Base64 Encoded String

You are presented with a Base64 encoded string that you wish to decode. The string has undergone a series of transformations, including an exclusive OR (XOR) operation and UTF-8 encoding.

To decode the Base64 string and reveal the original plaintext, follow these steps:

Firstly, convert the Base64 encoded string back to bytes using the Convert.FromBase64String() method:

byte[] data = Convert.FromBase64String(encodedString);

Then, decode the bytes to a string using the GetString() method of the System.Text.Encoding.UTF8 class, which will convert the bytes back to the original UTF-8 encoded string:

string decodedString = System.Text.Encoding.UTF8.GetString(data);

The resulting decodedString will be the original plaintext string that was encoded into Base64.

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