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A method of printing comprising, at an imaging device, receiving a print-by-reference print request and an encryption key from a mobile device, transmitting the print-by-reference print request and the encryption key to a print service, receiving encrypted print content from the print service, recei

A method of printing comprising, at an imaging device, receiving a print-by-reference print request and an encryption key from a mobile device, transmitting the print-by-reference print request and the encryption key to a print service, receiving encrypted print content from the print service, receiving a decryption key from the mobile device, decrypting the encrypted print content, creating decrypted print content, and printing the decrypted print content. A method of printing content requested from a mobile device, comprising receiving a print request and encrypted print content, receiving a decryption key from the mobile device, decrypting the encrypted print content, and printing the decrypted print content.

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1. An imaging device comprising: a processing circuit toreceive a print request and an encryption key from a mobile device;transmit the received print request and the encryption key to a print service, to cause the print service to obtain print content and encrypt the print content using the encrypt

1. An imaging device comprising: a processing circuit toreceive a print request and an encryption key from a mobile device;transmit the received print request and the encryption key to a print service, to cause the print service to obtain print content and encrypt the print content using the encryption key;upon receiving the encrypted print content from the print service, requests request a decryption key from the mobile device;receive the decryption key from the mobile device;decrypt the encrypted print content using the decryption key received from the mobile device; andprint the decrypted print content. 2. The imaging device of claim 1, wherein the print request includes a uniform resource locator indicative of a location of the print content. 3. The imaging device of claim 1, wherein the encryption key and decryption key are a symmetrical pair of keys generated by the mobile device. 4. The imaging device of claim 1, wherein the encrypted print content is content rendered into a format with which the imaging device is able to recognize and print. 5. The imaging device of claim 1, wherein the imaging device does not print the decrypted print content until the decryption key is received from the mobile device. 6. A method of printing content requested from a mobile device, comprising: receiving, by an imaging device, a print request and an encryption key from the mobile device;transmitting the received print request and the encryption key to the print service, to cause the print service to obtain print content and encrypt the print content using the encryption key;receiving, at the imaging device, the encrypted print content from the print service;upon receiving the encrypted print content, transmitting a request to the mobile device for a decryption key;receiving the decryption key from the mobile device;decrypting the encrypted print content using the decryption key received from the mobile device; andprinting the decrypted print content. 7. The method of claim 6, further comprising preventing the printing of the decrypted print content until the decryption key is received from the mobile device. 8. The method of claim 7, wherein the print request and the encrypted print content are received from a third-party print service, in which the third-party print service encrypted the print content. 9. The method of claim 6, wherein the transmitting of the request to the mobile device for the decryption key is after receiving the print request from the mobile device and the encrypted print content from the print service. 10. The method of claim 6, wherein after a length of time without receiving a decryption key from the mobile device, canceling the print request. 11. The method of claim 6, wherein the decrypted print content is content rendered into a format with which the imaging device is able to recognize and print. 12. A computer program product for printing content requested from a mobile device, the computer program product comprising: a computer readable storage medium storing instructions that, when executed by a processor, cause an imaging device to:receive a print request and an encryption key from the mobile device;transmit the received print request and encryption key to a print service;receive encrypted print content from the print service;transmit a request to the mobile device for a decryption key after receiving and the encrypted print content;receive the decryption key from the mobile device;decrypt the encrypted print content using the decryption key received from the mobile device; andprint the decrypted print content. 13. The computer program product of claim 12, wherein the instructions are to cause the imaging device to cancel the print request after a length of time without receiving the decryption key from the mobile device. 14. The imaging device of claim 1, wherein the encryption key is generated by the mobile device. 15. The imaging device of claim 1, wherein the decryption key is generated by the mobile device. 16. The method of claim 6, wherein the encryption key and the decryption key are generated by the mobile device. 17. The method of claim 10, wherein after canceling the print request the encrypted data is maintained encrypted. 18. The computer program product of claim 12, wherein the decryption key is to decrypt information that has been encrypted using the encryption key. 19. The imaging device of claim 1, wherein the imaging device determines that a user of the mobile device is not near the imaging device. 20. The method of claim 6, further comprising determining that a user of the mobile device has left an area of the imaging device.