How to handle users authentication for php webservice

PHP
1

The short story is this :

I have a web-service (zend framework based) that returns user saved data.
The clients are mobile applications + a possible website.

Query example :

webservice.com/?getdata&user=user1&pass=password

As you can see, I used a user & pass GET parameters for each request in order to validate the request.
This is because the clients are mobile applications that I’m not sure that support cookies. So each request to the service has to require user and pass.
I don’t like this and I’m not sure it’s the only solution.

What would you do in this case? Are there other solutions?

2

Use SSL to encrypt the requests.

3

It seems that this is the best way 2 go. Thank you.