Method for extracting equipment fingerprint information in wired network card signal

Abstract

The invention discloses a method for extracting equipment fingerprint information in a wired network card signal, which comprises the following steps of: performing normalization processing and judgment on an input signal to obtain a judgment signal; performing rising edge and falling edge clock extraction on the judgment signal, and synchronizing a local clock to obtain a synchronous clock; sampling the judgment signal by using a synchronous clock to obtain an ideal waveform synchronous with a local clock; using the ideal waveform signal as the filtering input of the adaptive filter and processing, so that the ideal signal approximates the received signal with the minimum mean square error after filtering, wherein the adaptive filter parameter at the moment is the equipment fingerprint of the network card; and extracting fingerprints from the input signals in a plurality of time periods to obtain stable fingerprints of the network card equipment. According to the invention, the device fingerprint information in the wired network card can be extracted, and the device fingerprint with both stability and identifiability is obtained, so that the identity authentication and authentication of the terminal device are realized, and the security of network access is realized.

Description

technical field [0001] The invention relates to the technical field of device fingerprint extraction of physical layer signals, in particular to a method for extracting device fingerprint information of a wired network card by using an adaptive filter. Background technique [0002] With the rapid development of computer technology, people's daily life is increasingly dependent on the network, and Ethernet is the most common computer network in real life. According to statistics, the Ethernet mode occupies about 80% of the world's network nodes, and almost all computers are equipped with Ethernet controllers. While the development of Ethernet technology brings convenience to people's lives, it also poses a great threat to the security of network information and property due to its extensive connectivity, resulting in illegal access to network resources and people's communications. Consequences such as threats to privacy and compromised computers. Therefore, how to ensure th...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the unsafe problem of using IP address / MAC address as computer terminal identity, the purpose of this invention is to propose a method for extracting device fingerprint information from wired network card signals

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