Covert physical layer slope authentication method in wireless communications and apparatus

A method for wireless communication reception, comprising:

• receiving a signal sent by a transmitting device, said signal comprising a regular signal and a tag signal and including packets grouped according to a pre-agreed key according to which power of each of the packets is determined, said tag signal forming an authentication signal;
• computing a test statistic based on the power of each of the packets;
• and
• identifying the tag signal by comparing the test statistic to a predetermined threshold value.

A wireless communication transmitting device comprising:

• a) a dividing unit, configured to divide a to-be-transmitted signal into (n+1) packets, comprising an (n+1)th packet and n packets preceding the (n+1)th packet, by using a pre-agreed key, where n is a positive integer, said to-be-transmitted signal comprising a regular signal and a tag signal, said tag signal forming an authentication signal;
• b) a first determining unit, configured to determine first power parameter adjustment factors for the n packets if a difference between an amplitude value of the regular signal and an amplitude value of the tag signal fails to meet a threshold requirement;
• c) a second determining unit, configured to determine a second power parameter adjustment factor for the (n+1)th packet according to an energy-limited condition of the to-be- transmitted signal power;
• d) an adjusting unit, configured to perform power adjustment according to the corresponding power parameter adjustment factors;
• and
• e) a transmitting unit, configured to send the to-be-transmitted signal after power adjustment.