{"title":"Secure replication for client-centric data stores","authors":"Kristof Jannes, B. Lagaisse, W. Joosen","doi":"10.1145/3565383.3566111","DOIUrl":null,"url":null,"abstract":"Decentralized, peer-to-peer systems using Conflict-free Replicated Data Types (CRDTs) can offer a more privacy-friendly alternative to centralized solutions that are often used by Big Tech. However, traditional CRDTs assume that all replicas are trusted, which is not necessarily the case in a peer-to-peer system. This paper presents a protocol for secure state-based CRDTs which provide fine-grained confidentiality and integrity by using encryption per field in every (sub)-document. Our protocol guarantees Strong Eventual Consistency despite any Byzantine replicas. It provides a fine-grained, dynamic membership and key management system, without violating Strong Eventual Consistency or losing concurrent updates. Our evaluation shows that the protocol is suitable for use in interactive, collaborative applications.","PeriodicalId":197460,"journal":{"name":"Proceedings of the 3rd International Workshop on Distributed Infrastructure for the Common Good","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 3rd International Workshop on Distributed Infrastructure for the Common Good","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1145/3565383.3566111","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Decentralized, peer-to-peer systems using Conflict-free Replicated Data Types (CRDTs) can offer a more privacy-friendly alternative to centralized solutions that are often used by Big Tech. However, traditional CRDTs assume that all replicas are trusted, which is not necessarily the case in a peer-to-peer system. This paper presents a protocol for secure state-based CRDTs which provide fine-grained confidentiality and integrity by using encryption per field in every (sub)-document. Our protocol guarantees Strong Eventual Consistency despite any Byzantine replicas. It provides a fine-grained, dynamic membership and key management system, without violating Strong Eventual Consistency or losing concurrent updates. Our evaluation shows that the protocol is suitable for use in interactive, collaborative applications.