title: Message Signing using X509 certificate
body: <p>I am signing message using digital certificate in a asp.net web service using below code.
  Signing is working fine expect signedMessage.ComputeSignature line is taking up to 30 to 40 seconds because of this i am face timeout exception. The same code when i am running under windows forms application is producing result in fraction of second. Any clue or help.</p>
  
  <pre><code>   public static string Encrypt(string fullMessage, string certificateName, bool deAttch)
      {
          X509Certificate2 signer = GetCertificate(certificateName);  
          byte[] contentBytes = Encoding.ASCII.GetBytes(fullMessage);  
          Oid contentOid = new Oid("1.2.840.113549.1.7.1", "PKCS 7 Data");
          SignedCms signedMessage = new SignedCms(new ContentInfo(contentOid, contentBytes), deAttch);
  
          signedMessage.ComputeSignature(new CmsSigner(signer));
  
          byte[] signedBytes = signedMessage.Encode();
          return Convert.ToBase64String(signedBytes).Trim();
          }
  </code></pre>