Abstract
We propose the compact PRESENT on embedded processors. To obtain high-performance, PRESENT operations, including an add-round-key, a substitute layer and permutation layer operations are efficiently implemented on target embedded processors. Novel PRESENT implementations support the Electronic Code Book (ECB) and Counter (CTR). The implementation of CTR is improved by using the pre-computation for one substitute layer, two diffusion layer, and two add-round-key operations. Finally, compact PRESENT on target microcontrollers achieved 504.2, 488.2, 488.7, and 491.6 clock cycles per byte for PRESENT-ECB, 16-bit PRESENT-CTR (RAM-based implementation), 16-bit PRESENT-CTR (ROM-based implementation), and 32-bit PRESENT-CTR (ROM-based implementation) modes of operation, respectively. Compared with former implementation, the execution timing is improved by 62.6%, 63.8%, 63.7%, and 63.5% for PRESENT-ECB, 16-bit PRESENT-CTR (RAM based implementation), 16-bit PRESENT-CTR (ROM-based implementation), and 32-bit PRESENT-CTR (ROM-based implementation) modes of operation, respectively.
Highlights
Lightweight cryptography is getting more important than ever due to the emergence of the Internet of Things
We propose a number of implementation techniques for well-known lightweight cryptography, namely PRESENT, and its Electronic Code Book (ECB) and Counter (CTR) on low-end embedded processors, where ECB encrypts the plaintext directly with the master key and CTR encrypts the counter value with the master key and the result of encryption is XORed with the plaintext
Novel implementation techniques for PRESENT block cipher can be extended to other lightweight cryptography algorithms and other platforms
Summary
Lightweight cryptography is getting more important than ever due to the emergence of the Internet of Things. The implementation of lightweight cryptography aims at optimizing certain criteria, such as energy consumption, execution time, memory footprint, and chip size. We propose a number of implementation techniques for well-known lightweight cryptography, namely PRESENT, and its Electronic Code Book (ECB) and Counter (CTR) on low-end embedded processors, where ECB encrypts the plaintext directly with the master key and CTR encrypts the counter value with the master key and the result of encryption is XORed with the plaintext. In order to achieve optimal results on target microcontrollers, we used processor-specific optimizations for PRESENT block ciphers. Novel implementation techniques for PRESENT block cipher can be extended to other lightweight cryptography algorithms and other platforms
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