Machine to machine communications

1. A computer implemented method for establishing a secure communication session between a client device and a first server resource, the method comprising:

receiving, at the first server resource from a router resource, a message originating from the client device;

determining, at the first server resource based on the content of the message, whether one or more security parameters required to serve the client device are available thereto;

when the security parameters are not available:

obtaining, at the first server resource, the one or more security parameters including receiving the one or more security parameters from a further resource;

establishing a secure communication session between the first server resource and the client device using the obtained security parameters.

2. The method of claim 1 , further comprising:

determining, at the first server resource, the identity of a second server resource currently serving the client device.

3. The method of claim 2 , wherein determining, at the first server resource, the identity of the second server resource currently serving the client device comprises:

transmitting, from the first server resource to a further resource, a query communication comprising a connection identifier; and

receiving, from the further resource, a response confirming the identity of the second server resource based on or in response to the connection identifier.

4. The method of claim 2 further comprising:

transmitting, from the first server resource to the second server resource, a query to confirm that the message is valid.

5. The method of claim 2 , wherein obtaining the one or more security parameters comprises:

receiving the one or more security parameters directly from the second server resource.

6. The method of claim 1 , further comprising:

storing the one or more security parameters at a security parameter database accessible to the first server resource.

7. The method of claim 1 , further comprising:

transmitting, from the first server resource to the client device, a message comprising a challenge.

8. The method of claim 7 , wherein the message comprising the challenge comprises a cookie.

9. The method of claim 8 , further comprising:

obtaining, at the first server resource, the cookie from the second server resource or from the further resource.

10. The method of claim 8 , further comprising:

generating, at the first server resource, the cookie.

11. The method of claim 8 , wherein the cookie comprises a cookie specific counter value.

12. The method of claim 7 , further comprising:

receiving, at the first server resource from the client device, a response to the challenge.

13. The method of claim 12 , further comprising:

validating, at the first server resource, the response to the challenge.

14. The method of claim 13 , further comprising:

obtaining, at the first server resource, the one or more security parameters when the response to the challenge is validated.

15. The method of claim 12 , further comprising:

transmitting, from the first server resource to the second server resource or the further resource, the response to the challenge for validation.

16. A computer implemented method for establishing a secure communication session between a client device and a first server resource, the method comprising:

receiving, at the first server resource from a router resource, a message originating from the client device;

determining, at the first server resource, based on the content of the message, whether security parameters required to serve the client device are available thereto;

when the security parameters are not available:

determining, at the first server resource, the identity of the server resource currently serving the client device;

transmitting update data to the router resource identifying the server resource currently serving the client device.

17. A computer implemented method for establishing a secure communication session between a client device and a first server resource, the method comprising:

receiving, at the first server resource from a router resource, a message originating at the client device;

determining, at the first server resource, based on the content of the message, whether security parameters required to serve the client device are available thereto;

when the security parameters are not available:

determining, at the first server resource, the identity of the server resource currently serving the client device;

transmitting, from the first server resource to the server resource currently serving the client device at least a portion of the content of the message to allow the server currently serving the device to respond to the message.