Secure data transfer on a handheld communications device
AssigneeBlackBerry Limited
InventorsMarc A. Drader, James Alexander Robinson, Michael Lorne Purdy
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Abstract
A handheld communications device for transmitting an encryption key is provided. The device comprises a display device, and a data processor. The data processor of the handheld communications device is in communication with the display device. The data processor is configured to generate an encryption key, and to vary a visual output of the display device over time in accordance with a bit sequence of the encryption key. The varying visual output comprises a sequence of colors and/or brightness levels output by the display device.
Claims12
A handheld communications device comprising:
- a display device having a backlight;
- and a data processor in communication with the display device, the data processor being configured to:
- generate an encryption key, the encryption key comprising a bit sequence;
- vary a predominant colour in an image over a period of time in an output generated on the display device to transmit a first part of the encryption key from the handheld communications device;
- and generate either a substantially solid white or gray image on the display and vary a sequence of brightness levels output by the backlight to transmit a second part of the encryption key.
A handheld communications device comprising a display device, a backlight for the display device and a data processor in communication with the display device, the handheld communications device comprising:
- a data processor in communication with the display device, the data processor being configured to:
- generate an encryption key via the data processor, the encryption key comprising a bit sequence;
- and
- generate either a substantially solid white or gray image on the display device and vary a sequence of brightness levels of output by the backlight to transmit a first part of the encryption key.
Dependencies are inferred from the claim text.