Hi,

Just wondering.. why is a CryptoStream with Rijndael/AES about 4 times
slower than one with 3DES (I've tried both Rijndael and
RijndaelManaged). Shouldn't it be the other way around?

Example code below.. Rijndael takes about 2s here, TripleDES only 0.5s.
Is there something wrong with my code? I sure hope so.. 3DES already is
pretty slow and Rijndael should be a whole lot faster normally.

thanks,
Max

MemoryStream ms = new MemoryStream();
SymmetricAlgorithm algo = Rijndael.Create(); // try TripleDES.Create()
ICryptoTransform transform = algo.CreateEncryptor();

CryptoStream cs = new CryptoStream(ms,transform,CryptoStreamMode.Write);

byte[] data = new byte[4096];

DateTime t = DateTime.Now;

for (int i = 0; i < 10000000; i += data.Length) {
  cs.Write(data, 0, data.Length);
}
cs.Flush();

TimeSpan dt = DateTime.Now - t;
Trace.WriteLine(dt.TotalMilliseconds);

cs.Close();
transform.Dispose();
algo.Clear();
ms.Close();