Wireless methods and devices employing steganography
View Patent ↗Wireless devices and methods employ steganography to convey auxiliary data in addition to audio information. An exemplary application is a battery-powered cell phone, having, e.g., a microphone, a speaker, a modulator, an antenna, and an RF amplifier. The steganographically-encoded auxiliary data can be sent to, and/or sent from, such a device, and used for purposes including authentication, system administration, etc.
1. A method comprising:
providing a digital information that is to be wirelessly transmitted to a portable device, and at said portable device be rendered in human-perceptible form to a consumer;
steganographically encoding said digital information with plural-bit auxiliary data, prior to being wirelessly transmitted;
at said portable device, recovering said auxiliary data that was steganographically encoded in said digital information;
storing said auxiliary data in said portable device; and
using said stored auxiliary data to control an aspect of the portable device's operation.
2. The method of claim 1 that includes using said stored auxiliary data to reprogram parameters of said portable device.
3. The method of claim 1 that includes transmitting digital information to plural portable devices, wherein each set of said transmitted digital information is steganographically encoded with the same plural-bit auxiliary data.
4. A method comprising:
providing a digital information that is to be wirelessly transmitted to a portable device, and at said portable device be rendered in human-perceptible form to a consumer;
steganographically encoding said digital information with plural-bit auxiliary data, prior to being wirelessly transmitted;
at said portable device, recovering said auxiliary data that was steganographically encoded in said digital information; and
using said auxiliary data to control an aspect of the portable device's operation.
5. The method of claim 4 that includes using said auxiliary data to reprogram parameters of said portable device.
6. The method of claim 4 that includes transmitting digital information to plural portable devices, wherein each set of said transmitted digital information is steganographically encoded with the same plural-bit auxiliary data.