secure data exchange between mobile and .net platforms

We are developing a product with .net web services and Android, iPhone, BlackBerry, Nokia, and Windows Mobile clients. The mobile apps are exchanging data with the server. For that exchange, I n开发者_如何学Goeed to provide secure communication for the data. How do we do encryption and decryption between these different languages?

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Just use an encrypted transport e.g. https.

Using https has lots of advantages:

• The encryption is all sorted for you, you just use the system services provided.
• It's easy to switch between http and https for debugging reasons.
• You don't get any problems for devices where you need to sign the application for a store, e.g. iPhone, if you include encryption in your application (other than transport encryption like https) you have to jump through more hoops and have a lot longer wait to get it into the appstore.