For securely transferring session information between a client and a server using claim numbers, a method is provided, including generating a claim number associated with a data session of a local device. The method may further include receiving a claim pickup request from a client application, the claim pickup request including the claim number. The method may also include verifying that the client application is executing on local device, responsive to the claim pickup request, and returning a session information package for the data session based on the claim number, in response to the claim pickup request.