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SAEW: A Security Assessment and Enhancement System of Wireless Local Area Networks (WLANs)

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Abstract

Aiming at increasingly serious security problems of wireless local area networks (WLANs), this paper analyzes and studies the different security attacks and threats according to the four layer network architecture of WLAN. A WLAN security assessment and enhancement system called SAEW is proposed, which comprises two subsystems of security assessment system of WLAN (SAW) and security enhancement system of WLAN (SEW). The SAW is based on fuzzy logic that combines layering analysis and relevance analysis. The security vulnerabilities of PHY and MAC layer, key management layer and identity authentication layer and relevance of the four layers are analyzed. The security index system of WLAN, fuzzy set and rule base are built based on the WLAN security analysis of the above four layers. Moreover, according to the principles of fuzzy logic, the security level of WLAN is acquired through fuzzy reasoning. Towards the WLAN with low security level, the security enhancement of WLAN is processed. The SEW builds the trusted WLAN to improve the security level of WLAN, which is based on trusted network connect (TNC). By introducing different roles in TNC, such as a metadata access point client defending WPA/WPA2 brute forcer, the security enhancement and defense mechanisms are realized. The results of case study show that the security level is promoted by trusted WLAN.

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Abbreviations

WLAN:

Wireless local area network

AP:

Access point

STA:

Mobile wireless station

AS:

Authentication server

AHP:

Analytic hierarchy process

SAEW:

Security assessment and enhancement system of WLAN

SAW:

Security assessment system of WLAN

SEW:

Security enhancement system of WLAN

TNC:

Trusted network connect

DMCG:

Distributed multi-core CPU and GPU parallel cracking method

NJ:

None jammers

SJ:

Single channel jammer

OLJ:

All channel jammer using interference of overlapping channels

ARJ:

All channel jammer with alterable jamming radius using interference of non-overlapping channels and adjustment of transmission power

ARES:

Anti-jamming reinforcement system

\(J\) :

Jamming degree of PHY and MAC layer

\({\textit{KS}}\) :

Key strength of key management layer

\({\textit{AM}}\) :

Authentication mechanism of identity authentication layer

\(V\) :

Security level

\({\textit{RP}}\) :

Regular passwords

\({\textit{LIRP}}\) :

Low number irregular passwords

\({\textit{HIRP}}\) :

High number irregular passwords

\({\textit{EHIRP}}\) :

Extremely high number irregular passwords

AR:

Access requestor

PEP:

Policy enforcement point

PDP:

Policy decision point

MAP:

Metadata access point

MAPC:

MAP client

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Authors and Affiliations

  1. School of Computer and Information Engineering, Tianjin Chengjian University, Tianjin, 300384, China

    Yong-lei Liu

  2. School of Electronic and Information Engineering, Tianjin University, Tianjin, 300072, China

    Zhi-gang Jin

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Correspondence to Yong-lei Liu.

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Liu, Yl., Jin, Zg. SAEW: A Security Assessment and Enhancement System of Wireless Local Area Networks (WLANs). Wireless Pers Commun 82, 1–19 (2015). https://doi.org/10.1007/s11277-014-2188-y

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