public void Encrypt_Decrypt_RoundTrips() { // Arrange var originalXml = XElement.Parse(@"<mySecret value='265ee4ea-ade2-43b1-b706-09b259e58b6b' />"); var encryptor = new DpapiNGXmlEncryptor("LOCAL=user", DpapiNGProtectionDescriptorFlags.None); var decryptor = new DpapiNGXmlDecryptor(); // Act & assert - run through encryptor and make sure we get back an obfuscated element var encryptedXmlInfo = encryptor.Encrypt(originalXml); Assert.Equal(typeof(DpapiNGXmlDecryptor), encryptedXmlInfo.DecryptorType); Assert.DoesNotContain("265ee4ea-ade2-43b1-b706-09b259e58b6b", encryptedXmlInfo.EncryptedElement.ToString(), StringComparison.OrdinalIgnoreCase); // Act & assert - run through decryptor and make sure we get back the original value var roundTrippedElement = decryptor.Decrypt(encryptedXmlInfo.EncryptedElement); XmlAssert.Equal(originalXml, roundTrippedElement); }