Abstract

The sensor network is a wireless network environment that consists of the many sensors of lightweight and low-power. Authentication between nodes is very vital for network reliability and the integrity of information collected by these nodes. Therefore, encryption algorithm for the implementation of reliable sensor network environments is required to the applicable sensor network. This paper gives a new proposed cryptosystem (MREBC) that is designed for 8 bits microcontroller systems. MREBC uses the concept of rotor enhanced block cipher which was initially proposed by the author in [NRSC 2002] on the first version of REBC. MREBC uses rotors to achieve two basic cryptographic operations; permutation, and substitution. Round key is generated using rotor too, which is used to achieve ciphertext key dependency. Rotors implemented using 8 bits successive affine transformation, which achieves memoryless, normalized ciphertext statistics, and small processing speed trend. The strength of this system is compared with the RIJNDAEL (AES) cipher. MREBC cipher gives excellent results from security characteristics and statistical point of view of. communication efficiency of MREBC is compared with AES through measuring performance by plaintext size, and cost of operation per hop according to the network scale. Arduino microcontroller board is used to implement both MREBC, and AES in order to compare the performance of algorithms. Authors suggests to use MREBC to implement a reliable sensor network environments.

Highlights

  • The sensor network is a wireless network environment that consists of the many sensors of lightweight and low-power [1]

  • Sensor network security can Sensor network shares some commonalities with a typical computer network, and poses unique requirements and has many constraints compared to a traditional computer network

  • Considering secret data used in MREBC, the total number of trials to break ciphertext shown in the following table (4)

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Summary

INTRODUCTION

The sensor network is a wireless network environment that consists of the many sensors of lightweight and low-power [1]. All security approaches require a certain amount of resources for the implementation, including data memory, code space, and energy to power the sensor. Currently these resources are very limited in a tiny wireless sensor. Public key encryption algorithm is a fundamental and widely used, but it has hardware requirements that exceeds sensor network capabilities, so it is not applied to the sensor network [2i]. Symmetric key encryption algorithms are simpler and has low-Energy consumption, so it can be used in the sensor networks. This paper, gives MREBC, a new symmetric key cryptosystem that meets the security requirements for sensor network and take into consideration the hardware limitations of sensors.

Overview
Key generation
Permutation
Key Dependency
MREBC Single Round
SYSTEM IMPLEMENTATION
Implementation results
ANALYSIS OF MREBC
Substation
Brute Force attack
Language Statistics
CONCLUSIONS

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