Low Level Sequence as an Anti-Tamper MEchanism
First Claim
1. A method for tamper detection of a transmitted signal, comprising;
- generating a first digital data signal having a first data rate;
generating a second digital data signal having a second data rate;
concurrently transmitting said first digital data signal at a first carrier frequency using a first modulation format, and said second digital data signal at a second carrier frequency using a second modulation formal;
selecting said second carrier frequency and a bandwidth of said second digital data signal so that said second digital data signal is contained within a frequency spectrum defined by a bandwidth of said first digital data signal; and
verifying an integrity of said first digital data signal at a remote receiver based on detection at said remote receiver of said second digital data signal.
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Accused Products
Abstract
A method is provided for tamper detection of a transmitted signal. The method is comprised of generating a first digital data signal having a first data rate. The method is also comprised of generating a second digital data signal having a second data rate. The method is further comprised of concurrently transmitting the first digital data signal at a first carrier frequency using a first modulation format and the second digital data signal at a second carrier frequency using a second modulation format. The method includes selecting the second carrier frequency and a bandwidth of the second digital data signal so that the second digital data signal is contained within a frequency spectrum defined by a bandwidth of the first digital data signal. The method also includes verifying an integrity of the first digital data signal at a remote receiver based on defection at the remote receiver of the second digital data signal. A system (100) is also provided for generating a tamper-protected transmitted signal.
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Citations
22 Claims
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1. A method for tamper detection of a transmitted signal, comprising;
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generating a first digital data signal having a first data rate; generating a second digital data signal having a second data rate; concurrently transmitting said first digital data signal at a first carrier frequency using a first modulation format, and said second digital data signal at a second carrier frequency using a second modulation formal; selecting said second carrier frequency and a bandwidth of said second digital data signal so that said second digital data signal is contained within a frequency spectrum defined by a bandwidth of said first digital data signal; and verifying an integrity of said first digital data signal at a remote receiver based on detection at said remote receiver of said second digital data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for generating a tamper-protected transmitted signal, comprising:
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a first data generator configured for generating a first digital data signal having a first data rate; a second data generator configured for generating a second digital data signal having a second data rate; a transmitter configured for concurrently transmitting said first digital data signal at a first carrier frequency using a first modulation format, and transmitting said second digital data signal at a second carrier frequency using a second modulation format, said second carrier frequency and a bandwidth of said second digital data signal contained within a frequency spectrum defined by a bandwidth of said first digital data signal; and wherein an integrity of said first digital data signal can be verified at a remote receiver based on detection at said remote receiver of said second digital data signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification