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Efficient hardware implementation of the lightweight block encryption algorithm LEA.

Donggeon Lee1, Dong-Chan Kim2, Daesung Kwon3

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This study presents the first comprehensive hardware implementation of the Lightweight Encryption Algorithm (LEA). LEA demonstrates high efficiency in hardware, making it suitable for secure communication on resource-constrained devices.

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Area of Science:

  • Cryptography and Network Security
  • Hardware Security Implementations
  • Lightweight Cryptography

Background:

  • The increasing prevalence of resource-constrained devices (smartphones, IoT) necessitates lightweight security solutions.
  • Ubiquitous networking environments demand robust and efficient encryption algorithms.
  • The Lightweight Encryption Algorithm (LEA) was previously proposed for software efficiency.

Purpose of the Study:

  • To provide the first comprehensive hardware implementation of the LEA block cipher.
  • To evaluate the hardware performance of LEA across different key sizes.
  • To assess LEA's suitability for resource-constrained devices in hardware.

Main Methods:

  • Design and implementation of various hardware structures for the LEA algorithm.
  • Performance evaluation based on key sizes.
  • Analysis of computational complexity using 32-bit operations, Addition, Rotation, and XOR.

Main Results:

  • Successful comprehensive hardware implementation of LEA.
  • Demonstrated high hardware efficiency, comparable to its software efficiency.
  • Detailed implementation results provided for various key sizes.

Conclusions:

  • LEA is highly efficient when implemented in hardware, not just software.
  • The algorithm's design, using simple operations and 32-bit calculations, facilitates efficient hardware realization.
  • LEA is a viable candidate for secure communication in resource-constrained hardware environments.