Hi, i specified the RSA_3DES_168_SHA algorithm and i got the following error.

The allowed algorithms field must contain at least one compression algorithm.Org.Mentalis.Security at Org.Mentalis.Security.Ssl.SecureSocket.ChangeSecurityProtocol(SecurityOptions options)
at Org.Mentalis.Security.Ssl.SecureSocket..ctor(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType, SecurityOptions options)
at _3DSecureBRDWS.ImplementaSSL.StartServer(IPEndPoint ep, SecureProtocol sp, Certificate cert)
at _3DSecureBRDWS.ImplementaSSL.IniciaSSL()

A cipher specification consists of a cipher and a compression algorithm. You only specified the cipher and not the compression algorithm. Try specifying the following value:

options.AllowedAlgorithms = SslAlgorithms.RSA_3DES_168_SHA | SslAlgorithms.NULL_COMPRESSION;

it works. thanks.