AFRICON 2009最新文献

An integrated security model for WLAN WLAN集成安全模型

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308183

Ondiwa Nashon Odhiambo, 1]E. Biermann, G. Noel

{"title":"An integrated security model for WLAN","authors":"Ondiwa Nashon Odhiambo, 1]E. Biermann, G. Noel","doi":"10.1109/AFRCON.2009.5308183","DOIUrl":"https://doi.org/10.1109/AFRCON.2009.5308183","url":null,"abstract":"IEEE802.11 wireless local Area Networks (WLAN) are widely deployed as extension to corporate wired LAN infrastructures. The implication of including WLAN as part of the computing infrastructure means more critical information and data is carried over the air. The threats of intrusion and denial of service is real since wireless networks have broadcasted traffic. IEEE 802.11 defines WEP, WPA and WPA2 security protocols as possible countermeasures. The most recent model defined by IEEE, the WPA2 emphasizes data confidentiality, integrity and authentication but pays little attention to availability issues. Management and control frames in WPA2 are still sent in clear making the model vulnerable to DoS attacks. The failure recovery processes requires reauthentication and reassociation a fact which makes the model easily exploited by various DoS attacks. WPA2, defines a hybrid network that implements both WEP and TKIP together with WPA2 which creates a vulnerability called security level roll back attack thus making the strong confidentiality and Integrity measures in WPA2 be as weak as WEP. In this paper, we propose an integrated security model (ISM) that incorporates a drop policy to defend against DoS attacks. We assume the use CCMP to provide Confidentiality and Integrity and use EAP-TTLS/802.11x with RADIUS to provide authentication. We use simulation in OPNET to show that our security model performs better to provide improved security in terms of confidentiality, integrity, authenticity and availability.","PeriodicalId":122830,"journal":{"name":"AFRICON 2009","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115234531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Assessing the written word: The engineering students' experience 评估书面文字:工科学生的经验

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308073

H. Israel, Henk J. de Jager

{"title":"Assessing the written word: The engineering students' experience","authors":"H. Israel, Henk J. de Jager","doi":"10.1109/AFRCON.2009.5308073","DOIUrl":"https://doi.org/10.1109/AFRCON.2009.5308073","url":null,"abstract":"Vygotsky's (1987) premise is that students write to learn, and that this learning stretches across the curriculum. The lecturer in the field of engineering has therefore to evaluate teaching and learning through writing tasks as they are traditionally known, and ask why assessment focuses on students' weaknesses - why does assessment instead not meet the student at his point of strength, and lead him from there? It is at this point that the various factors contributing to the learning experience of the student merge into one multi-faceted concept - assessment. Assessment skills are part of the learning process, yet equipping engineering lecturers with such skills in theory and practice is minimal. Assumptions are that if one is qualified in a content area, one can teach that content and objectively assess one's students. This is not always true. Reviewing assessment of the written word is vital because language is the means to academic success. The responsibility lying with the engineering lecturer when assessing writing tasks is further compounded by the education context, the worldview of the educator and the experience of the learner. Common issues confronting engineering educators and students emerge. This paper addresses some such issues.","PeriodicalId":122830,"journal":{"name":"AFRICON 2009","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123138824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enabling long distance AC power transmission by means of FACTS 通过FACTS实现远距离交流输电

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308090

R. Grunbaum, M. D. de Grijp, Valbert Moshi

引用次数: 3

Active power residential non-intrusive appliance load monitoring system 有功电力住宅非侵入式电器负荷监测系统

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308244

Arend J. Bijker, X. Xia, Jiangfeng Zhang

引用次数: 45

Advanced beamforming techniques for acoustic source localization 用于声源定位的先进波束形成技术

AFRICON 2009 Pub Date : 2009-11-03 DOI: 10.1109/AFRCON.2009.5308363

Tshilidzi Mukwevho, J. Jordaan, G. Noel