Hybrid Locking: An Effective Measure Against Reentrancy Attacks

Abstract

In the world of decentralized finance and smart contracts, the Ethereum blockchain stands as a pillar of innovation. However, with innovation comes the responsibility to fortify the systems against potential vulnerabilities. Reentrancy attacks pose a significant threat, exploiting vulnerabilities in the fabrication of smart contracts. These attacks can have severe consequences, compromising the integrity of transactions and jeopardizing the trust placed in blockchain technology. Many reentrancy solutions like yenta and ReVulDL have been implemented and various detection approaches have been proposed by various researchers. This paper proposed a “Hybrid Locking” mechanism to prevent Ethereum reentrancy which involves the combination of dynamic mutex locks and hierarchical locking which is lacking yet in research. This represents an innovative security enhancement for smart contracts by leveraging the proven concepts from concurrency control; establishing a multi-layered defense against reentrancy attacks, and addressing vulnerabilities that led to financial losses. This compelling solution press security issue in decentralized finance and proposed Hybrid Locking Mechanism shows promise, further empirical validation, and considerations for practical implementation which strengthen its contribution to the field of blockchain using context-aware defense mechanism against reentrancy attacks. The Hybrid Locking Mechanism demonstrated a 24.14% increase in effectiveness in preventing re-entrance compared to the average effectiveness of other approaches.