Abstract: A system and method of low-power cryptography is disclosed involving a computing device with an audio jack that communicates with a token plugged into the audio jack. Data is passed between the computing device and token over audio channels; power for all functions necessary for the token to operate as disclosed is also supplied by the computing device to the token over an audio channel. The token may be used as an identity and authentication security factor, for secure external key exchange, or direct encryption of small payloads.

Abstract: A system and method of low-power cryptography is disclosed involving a computing device with an audio jack that communicates using a flexible communication protocol with a token plugged into the audio jack. Data is passed between the computing device and token over audio channels; power for all functions necessary for the token to operate as disclosed is also supplied by the computing device to the token over an audio channel. The token may be used as an identity and authentication security factor, for secure external key exchange, or direct encryption of small payloads.

Abstract: A system and method of low-power cryptography is disclosed involving a computing device with an audio jack that communicates with a token plugged into the audio jack. Data is passed between the computing device and token over audio channels; power for all functions necessary for the token to operate as disclosed is also supplied by the computing device to the token over an audio channel. The token may be used as an identity and authentication security factor, for secure external key exchange, or direct encryption of small payloads.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes mechanisms for oversampling the color code flashes to enhance the accuracy of the method and system.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes code colors that may be framed with calibration elements.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication may include the distribution of public key for the dissemination of messages to a receiver with a private key.

Abstract: The present invention utilizes token-based authentication to verify the identity of a user computer. A host server computer transmits a main challenge via light code to an ancillary computer or software program having access to the token. The token translates the main challenge and provides a counterchallenge response back to the host computer over a back channel, distinct from the channel over which the main challenge arrived.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication may be used in multiple factor authentication for network communication between a client and server computer.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes calibration components that enhance the accuracy of the method and system.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication may be transmitted using multiple elements restricted to a particular function, including calibration transmission and data transmission.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes mechanisms for oversampling the color code flashes to enhance the accuracy of the method and system.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes code colors that may be framed with calibration elements.

Abstract: The present invention includes a light communication method and system wherein messages are transmitted via color code flashes. The light communication includes code colors formed from error-corrected binary values that enhance the accuracy of the method and system.