title: Porting cryptography APIs from Windows 8 to Win RT
body: <p>I'm trying to port code written in C# for Windows 8 to WinRT. The code uses Cryptography APIs that are in the System.Security.Cryptography namespace such as AesManaged, CryptoStream, and Rfc2898DerivedBytes. </p>
  
  <p>As far as I can tell, these do not seem to be available on Windows RT? I found the API documentation(here: <a href="http://msdn.microsoft.com/en-us/library/windows/apps/br211377.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/windows/apps/br211377.aspx</a>) and it lists a System.Security.Cryptography namespace but it doesn't include these classes. Are there equivalents/are they available under a different namespace maybe? Any advice for how to port this code if it is at all possible if the APIs are not available?</p>
  
  <p>Thanks,
  Ahmad</p>