Providing a partially encrypted data packet in a spread spectrum signal
First Claim
1. An electronic device for providing a partially encrypted data packet in a spread spectrum signal, the device comprising:
- a spread spectrum signal encoder having a data input, an output and a plurality of modulators;
a direct sequence generator with an output coupled to a modulator of said spread spectrum signal encoder;
a scrambling sequence generator with an output coupled to a modulator of said spread spectrum signal encoder;
a carrier generator with an output coupled to a modulator of said spread spectrum signal encoder; and
an output unit coupled to said output of said spread spectrum signal encoder, wherein in use when a data packet comprising a payload field of bits and non-payload field of bits is received at said data input of said spread spectrum signal encoder, said modulators of said spread spectrum signal encoder modulate said data packet to provide said partially encrypted data packet with said payload being a spread spectrum signal encrypted by a scrambling sequence from said scrambling sequence generator and at least part of said non-payload field comprises a spread spectrum signal free of encryption by said scrambling sequence.
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Accused Products
Abstract
A method, system and electronic device (100) for providing a partially encrypted data packet in a spread spectrum signal. The device has a spread spectrum signal encoder (140) having a data input, an output and a plurality of modulators (202,204,206) with inputs respectively coupled to outputs of a direct sequence generator (110), a scrambling sequence generator (120) and a carrier generator (125). There is also an output unit (150) coupled to an output of the spread spectrum signal encoder (140). In use when a data packet comprising a payload field of bits and non-payload field of bits is received by the spread spectrum signal encoder (140), the modulators (202,204,206) modulate the data packet to provide the partially encrypted data packet with the payload being a spread spectrum signal encrypted by a scrambling sequence from the scrambling sequence generator (120) and the non-payload field comprises a spread spectrum signal free of encryption by said scrambling sequence.
23 Citations
16 Claims
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1. An electronic device for providing a partially encrypted data packet in a spread spectrum signal, the device comprising:
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a spread spectrum signal encoder having a data input, an output and a plurality of modulators;
a direct sequence generator with an output coupled to a modulator of said spread spectrum signal encoder;
a scrambling sequence generator with an output coupled to a modulator of said spread spectrum signal encoder;
a carrier generator with an output coupled to a modulator of said spread spectrum signal encoder; and
an output unit coupled to said output of said spread spectrum signal encoder, wherein in use when a data packet comprising a payload field of bits and non-payload field of bits is received at said data input of said spread spectrum signal encoder, said modulators of said spread spectrum signal encoder modulate said data packet to provide said partially encrypted data packet with said payload being a spread spectrum signal encrypted by a scrambling sequence from said scrambling sequence generator and at least part of said non-payload field comprises a spread spectrum signal free of encryption by said scrambling sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing a partially encrypted data packet in a spread spectrum signal, the method comprising the steps of:
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receiving a data packet comprising a payload field of bits and non-payload field of bits;
modulating said data packet to provide said partially encrypted data packet with said payload field of bits being a spread spectrum signal encrypted by a scrambling sequence and at least part of said non-payload field comprises a spread spectrum signal free of encryption by said scrambling sequence; and
transmitting said partially encrypted data packet. - View Dependent Claims (9)
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10. A spectrum signal communication system comprising:
- a communication link; and
a plurality of electronic devices for providing a partially encrypted data packet in a spread spectrum signal, the electronic devices being in communication with each other by the communication link, and the electronic devices comprising;
a spread spectrum signal encoder having a data input, an output and a plurality of modulators;
a direct sequence generator with an output coupled to a modulator of said spread spectrum signal encoder;
a scrambling sequence generator with an output coupled to a modulator of said spread spectrum signal encoder;
a carrier generator with an output coupled to a modulator of said spread spectrum signal encoder; and
an output unit coupled to said output of said spread spectrum signal encoder, wherein in use when a data packet comprising a payload field of bits and non-payload field of bits is received at said data input of said spread spectrum signal encoder, said modulators of said spread spectrum signal encoder modulate said data packet to provide said partially encrypted data packet with said payload being a spread spectrum signal encrypted by a scrambling sequence from said scrambling sequence generator and at least part of said non-payload field comprises a spread spectrum signal free of encryption by said scrambling sequence. - View Dependent Claims (11, 12, 13, 14, 15, 16)
- a communication link; and
Specification