This chapter aims to provide a comprehensive survey of lightweight block ciphers that have been designed for resource-constrained IoT platforms. The implementations of 10 lightweight block ciphers are compared on 8-bit, 16-bit, and 32-bit microcontrollers by using evaluation metrics such as power and energy consumption, latency, security level, throughput, and efficiency metrics. Furthermore, advantages and disadvantages of these ciphers are discussed. Finally, authentication problems and solutions for IoT devices are discussed in detail.

Chapter Contents:

• 7.1 Block ciphers design primitives
• 7.1.1 Confusion and diffusion layers
• 7.2 Lightweight cryptography
• 7.2.1 Standardization for lightweight cryptography
• 7.2.2 Lightweight block ciphers for IoT
• 7.2.3 Software performance analysis of some of the lightweight block ciphers on ESP8266 Wi-Fi module for IoT implementations
• 7.3 Authentication problems and solutions for IoT devices
• 7.4 Conclusion
• Acknowledgment
• References

Inspec keywords: Internet of Things; power consumption; microcontrollers; cryptography

Other keywords: lightweight block ciphers; power consumption; authentication problems; microcontrollers; resource-constrained IoT platforms; energy consumption

Subjects: Mobile, ubiquitous and pervasive computing; Microprocessors and microcomputers; Electrical/electronic equipment (energy utilisation); Cryptography; Security aspects of hardware; Microprocessor chips