Patent ID: 9565173
Date: 2017-02-07
CPC Classifications: G06F,H04L

Claim:
1. A method for establishing trusted secure communications from a mobile device to a multi-function device, the method comprising: providing, by the multi-function device, a visual pattern encoding a cryptographic key, wherein the visual pattern comprises a dynamic display encoding the cryptographic key in a time domain by a sequence of visually perceptible modulations of a light emitting device, wherein the cryptographic key is an asymmetric key, whereby the mobile device can locally obtains at least one image of the visual pattern, whereby a line-of-sight between the mobile device and the multi-function device is ensured, whereby the mobile device can decodes the visual pattern to obtain the cryptographic key; receiving, from the mobile device, a communication comprising at least one datum encrypted using the cryptographic key; decrypting the communication to obtain the at least one datum; and performing an action based on the communication, wherein the action comprises one selected from the group consisting of: printing a document stored on the mobile device, and scanning a document to the mobile device.