Communication across domains

1. A computing device comprising:

a computer-readable storage device comprising instructions that are executable by the computing device to:

receive a first secret to enable communication of data with a sender across domains via an Iframe, the receipt of the first secret indicating that the computing device is determined to be untrusted by the sender as confirmed by a user of the sender;

apply a function to the first secret and a second secret provided by the computing device;

send a result of the function to the sender from the computing device; and

receive the data from the sender via a secure communication channel formed across the domains via the Iframe using the result and the second secret.

2. A computing device as described in claim 1 , wherein receipt of the first secret further indicates that the computing device is determined to be associated with a third-party site relative to the sender.

3. A computing device as described in claim 1 , wherein the first secret received by the computing device is configured as a cryptographic number from the sender and the second secret is configured as a cryptographic number.

4. A computing device as described in claim 3 , wherein the cryptographic numbers are random numbers.

5. A computing device as described in claim 1 , wherein the data received by the computing device is received via a server.

6. A computing device as described in claim 1 , wherein the data received by the computing device is received directly from the sender without use of a server.

7. A computing device as described in claim 1 , wherein the function applied to the first secret and the second secret is known by the sender.

8. A computing device as described in claim 1 , wherein the function applied to the first secret and the second secret is unknown by the sender.

9. A computing device as described in claim 1 , wherein the data received by the computing device is received in a message that includes the result of the function applied to the first secret and the second secret, inclusion of the result in the message indicating that the message originated from the sender.

10. A computing device as described in claim 1 , wherein the data received by the computing device is received in a message that includes the result of the function applied to the first secret and the second secret, the message including the result of the function within a body of the message.

11. A computing device as described in claim 10 , wherein the instructions are further executable by the computing device to parse the message to locate the result.

12. A method comprising:

receiving a first secret by a recipient, using a computing device, to enable communication of data with a sender across domains via an Iframe, the receiving of the first secret indicating that the recipient is determined to be untrusted by the sender and is associated with a third-party site relative to the sender as confirmed by a user of the sender;

applying a function by the recipient to the first secret and a second secret provided by the recipient;

sending a result of the function to the sender by the recipient;

receiving the data by the recipient as a plurality of messages via a secure communication channel formed across the domains via the Iframe using the result and the second secret.

13. A method as described in claim 12 , wherein each of the plurality of messages includes the result of the function applied to the first secret and the second secret within a body of said message.

14. A method as described in claim 12 , further comprising parsing each of the plurality of messages to locate the result of the function applied to the first secret and the second secret contained in a body of each said message.

15. A method as described in claim 12 , further comprising sending notifications to the sender indicating that the plurality of messages are received, the notifications including the result of the function applied to the first secret and the second secret and being parsable by the recipient to locate the result.

16. A method as described in claim 12 , wherein the Iframe is incorporated within a web-page.

17. A method as described in claim 12 , wherein the communication is enabled between an Iframe of the sender and an Iframe of the recipient.

18. A method as described in claim 12 , wherein the data exceeds a threshold amount of data permitted for a single message.

19. A method as described in claim 12 , wherein each of the plurality of messages includes a portion of the data that does not exceed a threshold amount of data permitted for a single said message.

20. A computer-readable storage device comprising instructions that are executable by a computing device to:

receive a first secret to enable communication of data with a sender across domains via an Iframe, the receipt of the first secret indicating that the computing device is determined to be untrusted by the sender as confirmed by a user of the sender;

apply a function to the first secret and a second secret provided by the computing device;

send a result of the function to the sender from the computing device; and

receive the data from the sender via a secure communication channel formed across the domains via the Iframe using the result and the second secret.