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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Popis
Shrnutí: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.
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ISSN:1545-5971
1941-0018
DOI:10.1109/TDSC.2007.70214