Opportunistic Encryption: A Trade-Off between Security and Throughput in Wireless Networks

Wireless network security based on encryption is widely prevalent at this time. However, encryption techniques do not take into account wireless network characteristics such as random bit errors due to noise and burst errors due to fading. We note that the avalanche effect that makes a block cipher...

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Vydané v:	IEEE transactions on dependable and secure computing Ročník 4; číslo 4; s. 313 - 324
Hlavní autori:	Haleem, M.A., Mathur, C.N., Chandramouli, R., Subbalakshmi, K.P.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Washington IEEE 01.10.2007 IEEE Computer Society
Predmet:	Algorithms and protection Codes Communication system security Cost/performance Cryptography Data encryption Digital Object Identifier Dynamic programming Emerging technologies Encryption Error correction Error correction codes Errors Fading integrity Mathematical model Mathematical models Modulation coding Network security Networks Optimization Propagation Security Security and Privacy Protection Signal to noise ratio Simulation Studies Throughput Tradeoffs Wireless communication Wireless networks Wireless sensor networks Wireless systems Security and Privacy Protection and protection Emerging technologies Wireless systems Security Optimization Wireless communication integrity Algorithms Data encryption Simulation Dynamic programming Cost/performance
ISSN:	1545-5971, 1941-0018
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Abstract	Wireless network security based on encryption is widely prevalent at this time. However, encryption techniques do not take into account wireless network characteristics such as random bit errors due to noise and burst errors due to fading. We note that the avalanche effect that makes a block cipher secure also causes them to be sensitive to bit errors. This results in a fundamental trade-off between security and throughput in encryption based wireless security.1 Further, if there is an adversary with a certain attack strength present in the wireless network, we see an additional twist to the security-throughput trade-off issue. In this paper, we propose a framework called opportunistic encryption that uses channel opportunities (acceptable signal to noise ratio) to maximize the throughput subject to desired security constraints. To illustrate this framework and compare it with some current approaches, this paper presents the following: 1) mathematical models to capture the security-throughput trade-off, 2) adversary models and their effects, 3) joint optimization of encryption and modulation (single and multirate), 4) the use of forward error correcting (FEC) codes to protect encrypted packets from bit errors, and 5) simulation results for Rijndael cipher. We observe that opportunistic encryption produces significant improvement in the performance compared to traditional approaches.
AbstractList	Wireless network security based on encryption is widely prevalent at this time. However, encryption techniques do not take into account wireless network characteristics such as random bit errors due to noise and burst errors due to fading. We note that the avalanche effect that makes a block cipher secure also causes them to be sensitive to bit errors. This results in a fundamental trade-off between security and throughput in encryption based wireless security.1 Further, if there is an adversary with a certain attack strength present in the wireless network, we see an additional twist to the security-throughput trade-off issue. In this paper, we propose a framework called opportunistic encryption that uses channel opportunities (acceptable signal to noise ratio) to maximize the throughput subject to desired security constraints. To illustrate this framework and compare it with some current approaches, this paper presents the following: 1) mathematical models to capture the security-throughput trade-off, 2) adversary models and their effects, 3) joint optimization of encryption and modulation (single and multirate), 4) the use of forward error correcting (FEC) codes to protect encrypted packets from bit errors, and 5) simulation results for Rijndael cipher. We observe that opportunistic encryption produces significant improvement in the performance compared to traditional approaches. Wireless network security based on encryption is widely prevalent at this time. However, encryption techniques do not take into account wireless network characteristics such as random bit errors and fading. For example, we note that properties such as the avalanche effect that make a block cipher secure also cause them to be sensitive to bit errors. Therefore, there is a fundamental trade-off between security and throughput in encryption based wireless security. Further, if there is an adversary with a certain attack strength present in the wireless network, we see an additional twist to the security-throughput trade-off issue. In this paper, we proposed a framework called opportunistic encryption that uses channel opportunities (acceptable signal to noise ratio) to maximize the throughput subject to desired security constraints. To illustrate this framework and compare it with some current approaches this paper presents the following: (a) mathematical models to capture the secuity-throughput trade-off; (b) adversary models and their effects; (c) joint encryption and modulation (single and multi-rate) optimization; (d) the use of forward error correcting (FEC) codes to protect encrypted packets from bit errors; and (e) simulation results for Rijndael cipher. We observe that opportunistic encryption produces signficant improvement in the performance compared to traditional approaches. [PUBLICATION ABSTRACT]
Author	Subbalakshmi, K.P. Chandramouli, R. Mathur, C.N. Haleem, M.A.
Author_xml	– sequence: 1 givenname: M.A. surname: Haleem fullname: Haleem, M.A. organization: Stevens Inst. of Technol., Hoboken – sequence: 2 givenname: C.N. surname: Mathur fullname: Mathur, C.N. organization: Stevens Inst. of Technol., Hoboken – sequence: 3 givenname: R. surname: Chandramouli fullname: Chandramouli, R. organization: Stevens Inst. of Technol., Hoboken – sequence: 4 givenname: K.P. surname: Subbalakshmi fullname: Subbalakshmi, K.P. organization: Stevens Inst. of Technol., Hoboken
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Cites_doi	10.1109/25.350282 10.1109/26.891214 10.1002/9781119183471 10.1109/ACSSC.2004.1399231 10.1109/26.634685 10.1109/JSAC.1987.1146536 10.1002/9780470317037 10.1109/MMCS.1999.778609 10.1109/18.641562 10.1109/TBC.2002.804034 10.1109/ICC.2004.1313264 10.1007/3-540-45508-6_13 10.1109/9780470545287 10.1017/CBO9780511804441 10.1109/GLOCOM.2005.1577932 10.1109/ACSSC.2003.1292104 10.1109/25.293655 10.1109/TC.1979.1675242
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SubjectTerms	Algorithms and protection Codes Communication system security Cost/performance Cryptography Data encryption Digital Object Identifier Dynamic programming Emerging technologies Encryption Error correction Error correction codes Errors Fading integrity Mathematical model Mathematical models Modulation coding Network security Networks Optimization Propagation Security Security and Privacy Protection Signal to noise ratio Simulation Studies Throughput Tradeoffs Wireless communication Wireless networks Wireless sensor networks Wireless systems
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Title	Opportunistic Encryption: A Trade-Off between Security and Throughput in Wireless Networks
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