Abstract

Nowadays, there is a strong demand for increasing the protection of resource-constrained devices such as Radio frequency identification (RFID) systems. Current cryptographic algorithms are sufficient for high-resource desktop computers. RFID systems are commonly used in high-security applications such as access control systems, transaction banking systems, and payment systems. The attacker attempts to mislead RFIDs for unauthorized access to services without payment or to circumvent security mechanisms by detecting a secret password. The biggest challenge in RFID systems is how to ensure successful protection against such infringements. Lightweight cryptography can provide security assurance for protecting RFID systems. This article presents a new ultra-lightweight cryptography algorithm for RFID systems called SLIM. SLIM is a 32-bit block cipher based on the Feistel structure since block ciphers are the most used cryptographic and provide very tight protection for IoT devices. The key challenge in designing a lightweight block cipher is to cope with performance, cost, and security. SLIM, like all symmetric block cipher, uses the same key for encryption and decryption. The proposed algorithm has an excellent performance in both hardware and software environments, with a limited implementation area, an acceptable cost/security for RFID systems, and an energy-efficient behaviour. SLIM has demonstrated high immunity against the most effective linear and differential cryptanalysis attacks and has a sufficient margin of defence against these attacks.

Highlights

  • Saving human life is considered the most important demands in the world

  • Modern encryption algorithms designed for high-end devices are not suitable for Radio-frequency identification (RFID) tags because the implementation of these schemes would require ample computational power, memory, and resources [2]

  • This paper proposed a new ultra-lightweight cryptography algorithm for RFID systems called Agile

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Summary

INTRODUCTION

Saving human life is considered the most important demands in the world. the real-time healthcare monitoring system of patients’ physical conditions is one of the significant requirements of hospital authorities. In the context of this paper, passive RFID tags are important because passive tags have very limited memory, power, and computing capability and applying standard security algorithms is not feasible. This paper proposes a new ultra-lightweight cryptographic algorithm suitable for RFID restricted tags. With simple operations on the RFID tag, it will be enabled to defend against different types of attacks, which make it very attractive to low-cost RFIDs. The most widely used cryptographic primitive is block cipher nowadays that provides very tight security to IoHT devices and can be applied to encryption, hashing, authentication, and random bit generations. The biggest challenge to design lightweight block cipher is to cope with trade-offs between performance, cost, and security This is not possible to provide all these three properties together to resourceconstrained devices.

RELATED WORK
SINGLE ROUND PROCESSING
SUBSTITUTION LAYER
IMPLEMENTATION CONSIDERATIONS OF THE PROPOSED SLIM ALGORITHM
HARDWARE IMPLEMENTATION OF THE PROPOSED SLIM ALGORITHM
ANALYSIS OF THE PROPOSED SLIM ALGORITHM
LINEAR CRYPTANALYSIS
DIFFERENTIAL CRYPTANALYSIS
CONCLUSION

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