Hi,

I hope someone can give me some advice on which form of security i can use
best in this scenario:

I have a free application that everbody on the internet can download.
It calls a webservice retrieve it's data. Currently it's not secured, so
anybody can use it.

I want to secure it, but the guy who owns the server does not want to make
use of windwos authentication, so that's not an option.

I would only like that my application can access the webservice. Which do
you think is the best way? (and perhaps i also need to use this for a
windows mobile application, is that also possible in your suggestion?)

I hope someone can give me some useful advice.

Greetings,
Jeroen