ÆGIS: Smart Shielding of Smart Contracts

Christof Ferreira Torres*, Mathis Baden, Robert Norvill, Hugo Jonker

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review


In recent years, smart contracts have suffered major exploits, losing millions of dollars. Unlike traditional programs, smart contracts cannot be updated once deployed. Though various tools were pro-posed to detect vulnerable smart contracts, they all fail to protect contracts that have already been deployed on the blockchain. More-over, they focus on vulnerabilities, but do not address scams (e.g.,honeypots). In this work, we introduce ÆGIS, a tool that shields smart contracts and users on the blockchain from being exploited.To this end, ÆGIS reverts transactions in real-time based on pat-tern matching. These patterns encode the detection of malicious transactions that trigger exploits or scams. New patterns are voted upon and stored via a smart contract, thus leveraging the benefits of tamper-resistance and transparency provided by blockchain. By allowing its protection to be updated, the smart contract acts as a smart shield.
Original languageEnglish
Title of host publicationCCS '19 Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security
Place of PublicationNew York, NY
PublisherAssociation for Computing Machinery (ACM)
Number of pages3
ISBN (Print)9781450367479
Publication statusPublished - 6 Nov 2019
Event2019 ACM SIGSAC Conference on Computer and Communications Security - London, United Kingdom
Duration: 11 Nov 201915 Nov 2019
Conference number: 2019


Conference2019 ACM SIGSAC Conference on Computer and Communications Security
Abbreviated titleACM CCS 2019
Country/TerritoryUnited Kingdom


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