Decentagram: Highly-Available Decentralized Publish/Subscribe Systems

This paper presents Decentagram, a decentralized framework for data dissemination using the publish/subscribe messaging model. Decentagram uses blockchain smart contracts to authenticate events that will be published using digital signatures or self-attestation certificates from code running in trus...

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Bibliographic Details
Main Authors: Zheng, Haofan, Tran, Tuan, Shadmon, Roy, Arden, Owen
Format: Conference Proceeding
Language:English
Subjects:
Blockchain
Blockchains
Codes
Costs
Data dissemination
Data models
Enclave
Pub/Sub
Publish/Subscribe
Smart Contract
Smart contracts
TEE
Throughput
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Summary:This paper presents Decentagram, a decentralized framework for data dissemination using the publish/subscribe messaging model. Decentagram uses blockchain smart contracts to authenticate events that will be published using digital signatures or self-attestation certificates from code running in trusted execution environments (TEEs), both of which are verified on-chain. This approach permits any host with valid credentials to publish verified updates, increasing decentralization and availability of the system as a whole by simplifying compensation and incentivization, even for untrusted hosts running TEEs. Decentagram also supports on-chain subscribers where third-party contracts receive events immediately: within the same transaction as the published event. The same event will also be delivered to off-chain subscribing applications through an off-chain event broker. We provide an open-source implementation of Decentagram, and evaluate the gas cost of its on-chain components and the end-to-end latency of its off-chain component.
ISSN:2158-3927
DOI:10.1109/DSN58291.2024.00037