Performance Comparison of Spongent and Photon Hashing Algorithms in Ethereum-based Blockchain System

ISO/IEC 29192-5 defines three lightweight cryptography hash function algorithms. Some of the lightweight cryptography based on sponge construction are PHOTON and SPONGENT. Given the importance of the hash functions in blockchain technology and the vulnerability and computational power gaps that affect the performance of the blockchain platform, this research will evaluate the SPONGENT-256 and PHOTON-256 hash algorithms to be implemented on Ethereum-based blockchain systems. The implementation of the SPONGENT-256 and PHOTON-256 hash algorithms on an Ethereum-based blockchain system produces output in the form of addresses, public keys and wallets. The experiment results of the SPONGENT-256 algorithm produces is average 0.0328 seconds, with the user time is 0.0208 seconds and the system time is 0.0118 seconds. This will give significant results if implemented on an Ethereum-based blockchain system with many nodes and data to be generated. However, the SPONGENT-256 algorithm requires a lot of memory for processing with 75%. While the KECCAK-256 algorithm uses less memory from the PHOTON-256 and the SPONGENT-256 algorithms with an average memory usage of 55%. Based on the implementation of the SPONGENT-256 hash algorithm on the Ethereum-based blockchain and analysis of the results, it can be concluded that the SPONGENT-256 algorithm can be used as an alternative hash function algorithm for Ethereum-based blockchain system.