I was asked to investigate how to run certificate-based authentication on both Windows Mobile 6.5 and Symbian (Nokia) devices. The most common type of authentication when running ActiveSync is Basic Authentication. This basically means that when the client (in this case your mobile phone) makes a request, it will supply a username and password. For security, SSL encryption is used so your username and password is not sent over the Internet in cleartext. Sure, you could skip the SSL certificate [...]

