SECURE DECENTRALIZED APPLICATIONS CRYPTOSYSTEM WITH SOONER-LIGHTWEIGHT CRYPTOGRAPHIC SCHEMES

ABSTRACT

Blockchain technology is a disruptive technology, and renowned for their strong cryptography and encryption algorithms but, susceptible to Quantum Computing (QS). Several improvements (such as block hash size, encryption/decryption time, key generation sizes, and transaction delays) are to be performed on its traditional cryptography to support decentralized applications (DAPPs) and overcome threats of QS. This paper proposes two lightweight cryptographic schemes (Sooner-C1 and Sooner-C2) and utilises them to build a DAPPs prototype based on blockchain technology to preserving privacy of data. Sooner-C2 (1.24%) and Sooner-C1 (9.8%) were the fastest during block generation for DAPPs. Sooner-C1 (12.43%) and Sooner-C2 (12.58%) offers shorter block sizes when compared to traditional schemes. Moreso, Sooner-C1 (41.39%) and Sooner-C2 (32.79%) achieves slower transaction rates against traditional schemes. Consequently, the DAPPs are relatively secure and privacy-protected with the developed schemes because of the hardened-digital signatures holding the blocks and meta-data in a smart farming setting.

Keywords: DAPPs, Lightweight Cryptography, Blockchain, Security and Privacy, Digital Signatures, Performance.