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تفاصيل البطاقة الفهرسية

Packet Header Obfuscation Using MIMO

مقال من تأليف: Cao, Yue ; Krishnamurthy, Srikanth V. ; La Porta, Thomas F. ; Atya, Ahmed Osama Fathy ; Singh, Shailendra ; Qian, Zhiyun ; Krishnamurthy, Prashant ; Marvel, Lisa ;

ملخص: Eavesdroppers can exploit exposed packet headers towards attacks that profile clients and their data flows. In this paper, we propose FOG, a framework for effective full and partial header blinding using MIMO, to thwart eavesdroppers. FOG effectively tracks header bits as they traverse physical (PHY) layer sub-systems that perform functions like scrambling and interleaving. It combines multiple blinding signals for more effective and less predictable obfuscation, as compared to using a fixed blinding signal. We implement FOG on the WARP platform and demonstrate via extensive experiments that it yields better obfuscation than prior schemes that deploy full packet blinding. It causes a bit error rate (BER) of > 40 % at an eavesdropper if two blinding streams are sent during header transmissions. Furthermore, even with full header blinding, FOG incurs a very small throughput hit of ?5% with one blinding stream (and 9 % with two streams). Full packet blinding incurs much higher throughput hits (25 % with one stream and 50 % with two streams).


لغة: إنجليزية