RsaEncryptionCookieTransform Broken for Framework 4.7 & 4.8

[jaskirat-randhawa]

We are using the below code to encrypt & decrypt string.

Below works for framework 4.6, however fails with error ID6041

`const string thumbPrint = "thethumbprint";

var store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);

var certificates = store.Certificates.Find(X509FindType.FindByThumbprint, thumbPrint, false);

var cert = certificates[0];

var cookieTransform = new RsaEncryptionCookieTransform(cert);

string myStr = Guid.NewGuid().ToString();

Console.WriteLine("String before encoding is " + myStr);

var bytes = cookieTransform.Encode(Encoding.UTF8.GetBytes(myStr));

var decodedByteArray = cookieTransform.Decode(bytes);

Console.WriteLine("Decoded byte string is " + Encoding.UTF8.GetString(decodedByteArray));`