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A hmac-based perceptual interference countermeasure method

An anti-interference and primary user technology, applied in electrical components, wireless communication, security devices, etc., can solve problems such as insufficient detection performance, achieve the effect of solving insufficient detection performance and overcoming high system overhead

Inactive Publication Date: 2018-04-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a method for countering perceptual interference based on HMAC, which solves the existing problem of insufficient detection performance when the attack signal sent by the attacker is the signal sent by the previous PU

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  • A hmac-based perceptual interference countermeasure method

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment:

[0020] Such as figure 1 Shown is an implementation flowchart of an HMAC-based perceptual interference countermeasure method, including the following steps:

[0021] Step 1. The primary user (PU) generates a 64-bit pseudo-random sequence or pseudo-random noise (PRN), which is denoted as field M;

[0022] Step 2. Build a random function f(t) based on time t, which randomly generates random numbers with time as a variable; use function f(t) to randomly generate a random number L with a length ranging from 80 to 160 bits according to the current time ;

[0023] The field M is used as the input of the Hash-based Message Authentication Code (HMAC) algorithm, and a digest D with the same length as the random number L is generated under the action of the shared key K; the primary user (PU) combines the generated digest D with The field M is conn...

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Abstract

The invention provides an HMAC-based perceptual interference countermeasure method, which belongs to the technical field of cognitive radio spectrum sensing. The method provided by the present invention is based on the cryptography using Hash Message Authentication Code (HMAC), and first uses energy detection to determine whether the corresponding frequency spectrum is occupied by the primary user (PU); when it is determined that the corresponding frequency spectrum is occupied by the primary user , then a secure spectrum sensing method based on HMAC is applied to determine whether the spectrum is really occupied by the PU or by the attacker (MU). The present invention can not only accurately detect and distinguish malicious users, but also has obvious performance advantages in MU judgment compared with the existing energy detection and AES-based detection methods, especially when the attacker's attack signal is received before forwarding. When a signal is sent by the user.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio spectrum sensing, and in particular relates to an HMAC-based sensing interference countermeasure method. Background technique [0002] Cognitive radio is considered as a method to solve the problem of underutilized spectrum in the wireless communication field. Spectrum sensing is used to identify unused spectrum, and unauthorized users can access the corresponding spectrum opportunistically; however, spectrum sensing is easy Subject to various attacks, primary user impersonation attack (PUEA) is a typical one, so it is necessary to introduce corresponding anti-jamming mechanism to improve the anti-jamming capability of spectrum sensing technology. In view of the limited detection ability of the current PUEA anti-jamming method in detecting replay attacks, a PUEA anti-jamming mechanism is needed to resist the detection and replay attacks in which the attacker's attack signal is the signal s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/00H04W12/122
CPCH04W12/00
Inventor 赵军彭启航
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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