Lighting system, a light source, a device and a method of authorizing the device by the light source
First Claim
1. A lighting system comprising a light source for emitting light, a device for controlling the light source, a first communication channel from the light source to the device, the first communication channel being formed by modulating information in the emitted light of the light source, and a second communication channel from the device to the light source, the light source comprising:
- a challenge generator for generating a challenge with a cryptographic function receiving an argument comprising a first cryptographic key,a light source transmitter for transmitting the challenge via the first communication channel,a light source receiver for receiving a response from the device via the second communication channel, andan authorizing means for authorizing the device to control the light source by matching the received response with a reference (ref), and if the received response matches the reference (ref), the device is authorized,the device comprising;
a device receiver for receiving the challenge via the first communication channel,a response generator for generating the response with the cryptographic function receiving arguments comprising the received challenge and a second cryptographic key, anda device transmitter for transmitting the response to the light source via the second communication channel.
3 Assignments
0 Petitions
Accused Products
Abstract
A lighting system (100), a light source (110), a device (150), and a method of authorizing the device (150) by the light source (110) are provided. The lighting system (100) comprises a light source (110) to emit light (116), a device (150) to control the light source(110), a first communication channel from the light source (110) to the device (150), and a second communication channel from the device (150) to the light source (110). The first communication channel is formed by modulating information in the emitted light (116) of the light source (110). The light source (110) comprises a challenge generator (118), a light source transmitter (112), a light source receiver (122) and an authorizing means (120). The challenge generator (118) generates a challenge with a cryptographic function receiving an argument comprising a first cryptographic key. The light source transmitter (112) transmits the challenge via the first communication channel. The light source receiver (122) receives a response from the device via the second communication channel. The authorizing means (120) authorizes the device (150) to control the light source (110) by matching the received response with a reference, and if the received response matches the reference, the device (150) is authorized. The device (150) comprises a device receiver (152), a response generator (154) and a device transmitter (156). The device receiver (152) receives the challenge via the first communication channel. The response generator (154) generates the response with the cryptographic function which receives arguments comprising the received challenge and a second cryptographic key. The device transmitter (156) transmits the response to the light source via the second communication channel.
6 Citations
15 Claims
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1. A lighting system comprising a light source for emitting light, a device for controlling the light source, a first communication channel from the light source to the device, the first communication channel being formed by modulating information in the emitted light of the light source, and a second communication channel from the device to the light source, the light source comprising:
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a challenge generator for generating a challenge with a cryptographic function receiving an argument comprising a first cryptographic key, a light source transmitter for transmitting the challenge via the first communication channel, a light source receiver for receiving a response from the device via the second communication channel, and an authorizing means for authorizing the device to control the light source by matching the received response with a reference (ref), and if the received response matches the reference (ref), the device is authorized, the device comprising; a device receiver for receiving the challenge via the first communication channel, a response generator for generating the response with the cryptographic function receiving arguments comprising the received challenge and a second cryptographic key, and a device transmitter for transmitting the response to the light source via the second communication channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Method of authorizing a device by a light source for allowing the device to control the light source, the method comprises the steps of:
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generating a challenge with a cryptographic function receiving an argument comprising a first cryptographic key, transmitting the challenge from the light source to the device via a first communication channel being formed by modulating information in light emitted by the light source, receiving the challenge from the first communication channel, generating a response with the cryptographic function receiving arguments comprising the received challenge and a second cryptographic key, transmitting the response from the device to the light source via a second communication channel, receiving the response from the second communication channel, and authorizing the device by matching the received second pseudo identifier with a reference, and, if the received second pseudo identifier matches the reference, the device is authorized by the light source.
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Specification