Trying to crack into Kickstarter's API.

So, I've been doing some research and reversing lately on kickstarter. What I am being stopped at currently is the fact that they use an encryption method to protect their api's (no shit, I know).
Here is what I got so far:

https://api.kickstarter.com/v1/projects/near?location_id=1922&signature=1348352293.57b05db4d00763922cc375c78c79674f2f0e30dc
 
https://api.kickstarter.com/v1/projects/1497426060?signature=1348350351.325c9611aff1a7c45936766f32af14f972a8530a
 
I believe that they are encrypting the request url and making that signature with the timestamp(doesn't matter) at the beginning, because if you change anything in that request, your request won't be fulfilled. Any help I could get from you guys on finding the encryption method and the key(if they are using one)?

hack my anus

To protect their API's what?

why would publicly expose an API and then encrypt it..?

Ask yourself what generates those URLs. Client-side JS?

>>4
It's a private API, genius. Kickstarter's own apps use it.