AES Encryption Java -> PHP -> Java

In my Android app I am communicating with a web service the data sent and responded are encrypted with AES encryption. So what I do is the following. I'm sending a base64 encoded A

Solution 1:

I suggest you take a look at http://phpaes.com/. It's a free AES encryption library implemented purely in PHP; it's fast and very very simple to use.

At the very least, it allows you get one step closer to isolating the true source of the issue.

Solution 2:

This might not be the answer you're looking for - but is there a specific reason you're manually encrypting this data instead of using SSL/HTTPS?

In most cases HTTPS will be easier to implement and more secure than manually implementing a symmetric cipher.