Vegas -- A Secure and Privacy-Preserving Peer-to-Peer Online Social Network

Durr, Michael; Maier, M. E.; Dorfmeister, Florian

doi:10.1109/socialcom-passat.2012.42

Cited by 24 publications

(16 citation statements)

References 11 publications

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“…External resources are used to cope with the situations in which the users cannot deliver the service by themselves. Vis-à-Vis [22], Vegas [23], and SuperNova [24] are only three examples of approaches in which cloud services are used.…”

Section: Decentralized Online Social Networkmentioning

confidence: 99%

Blockchain-based access control management for Decentralized Online Social Networks

Rahman

Guidi

Baiardi

2020

Journal of Parallel and Distributed Computing

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Online Social Networks (OSNs) represent today a big communication channel where users spend a lot of time to share personal data. Unfortunately, the big popularity of OSNs can be compared with their big privacy issues. Indeed, several recent scandals have demonstrated their vulnerability. Decentralized Online Social Networks (DOSNs) have been proposed as an alternative solution to the current centralized OSNs. DOSNs do not have a service provider that acts as central authority and users have more control over their information. Several DOSNs have been proposed during the last years. However, the decentralization of the social services requires efficient distributed solutions for protecting the privacy of users. During the last years the blockchain technology has been applied to Social Networks in order to overcome the privacy issues and to offer a real solution to the privacy issues in a decentralized system. However, in these platforms the blockchain is usually used as a storage, and content are public. In this paper, we propose a manageable and auditable access control framework for DOSNs using blockchain technology for the definition of privacy policies. The resource owner uses the public key of the subject to define auditable access control policies using Access Control List (ACL), while the private key associated with the subject's Ethereum account is used to decrypt the private data once access permission is validated on the blockchain. We provide an evaluation of our approach by exploiting the Rinkeby Ethereum testnet to deploy the smart contracts. Experimental results clearly show that our proposed ACL-based access control outperforms the Attribute-based access control (ABAC) in terms of gas cost. Indeed, a simple ABAC evaluation function requires 280,000 gas, instead our scheme requires 61,648 gas to evaluate ACL rules.

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Section: Decentralized Online Social Networkmentioning

confidence: 99%

Blockchain-based access control management for Decentralized Online Social Networks

Rahman

Guidi

Baiardi

2020

Journal of Parallel and Distributed Computing

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“…Vegas [234] was designed as a secure OSN that limits the access to a user's social graph to the ego network only. It ensures that users have full control over who can access their personal profile and published content by enforcing strong trust relationships that are mapped to the real world.…”

Section: Vegasmentioning

confidence: 99%

Peer-to-Peer-Based Social Networks: A Comprehensive Survey

Masinde

Graffi

2020

SN COMPUT. SCI.

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The use of online social networks, such as Facebook and Twitter, has grown at a phenomenal rate. These platforms offer services that support interactions via messaging, chatting or audio/video conferencing, and also sharing of content. Most, if not all, of these platforms use centralized computing systems; therefore, the control and management of the systems lies entirely in the hands of one provider, who must be trusted to treat the data and communication traces securely. As a zero-trust alternative, peer-to-peer (P2P) technologies promise to support end-to-end communication, uncompromising access control, anonymity and resilience against censorship and massive data leaks through misused trust. The goals of this survey are threefold. First, the survey elaborates the properties of P2P-based online social networks and defines the requirements for such (zero-trust) platforms. Second, it gives an exposition of the building blocks for P2P frameworks that allow the creation of such sophisticated and demanding applications, such as user/identity management, reliable data storage, secure communication, access control and general-purpose extensibility, which are not properly addressed in other P2P surveys. As a third point, it gives a comprehensive analysis of proposed P2P-based online social network applications, frameworks and architectures by exploring the technical details, inter-dependencies and maturity of these solutions.

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“…Cachet [27], PeerSon [8], Safebook [9], and LifeSocial [13] build a peer-to-peer (p2p) system where peers are not necessarily trusted. Polaris [36], My3 [25] and Vegas [11] build a p2p network among friends to replicate data. Confidant [20], Tent [4], and Vis-a-Vis [31] build a distributed platform by building a protocol among servers that process user data.…”

Section: Related Workmentioning

confidence: 99%

“…Additionally, OSNs have predictive capabilities about the users as they continuously gather user data. Researchers have tried to address privacy concerns by user-based key management [6,12,14,34], peer-to-peer architectures [8,9,11,13,25,27,32,36], or decentralized platforms [1,3,20,30,31,33,35,38]. In general, peer-to-peer OSN architectures suffer from inefficiency due to high churn rate of users.…”

Section: Introductionmentioning

confidence: 99%

POSN: A Personal Online Social Network

Erdin

Klukovich

Gunduz

et al. 2015

ICT Systems Security and Privacy Protection

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Abstract. A growing concern for end users of Online Social Networks (OSNs) is the privacy and control of user data due to the client-server architecture of the current ecosystems. In this paper, we introduce a privacy preserving decentralized OSN platform, which mimics real life social interactions. In particular, we decentralize the OSN platform and give direct control of the information to the user. The distributed platform removes central authorities from the OSN and users share their content only with intended peers through mobile devices. This decentralized system ensures that interaction happens between friends and third parties cannot access the user content or relationships. To be able to efficiently share objects and provide timely access in the POSN platform, we take advantage of free storage clouds to distribute encrypted user content. The combination of phone-to-phone applications with cloud infrastructure would address the availability limitation of peer-to-peer systems, while enjoying the benefits of peer-to-peer systems, such as no central authority and scalability.

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Vegas -- A Secure and Privacy-Preserving Peer-to-Peer Online Social Network

Cited by 24 publications

References 11 publications

Blockchain-based access control management for Decentralized Online Social Networks

Blockchain-based access control management for Decentralized Online Social Networks

Peer-to-Peer-Based Social Networks: A Comprehensive Survey

POSN: A Personal Online Social Network

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