scholarly journals CCD: Efficient Customized Content Dissemination in Distributed Publish/Subscribe

2009 ◽  
pp. 62-82 ◽  
Author(s):  
Hojjat Jafarpour ◽  
Bijit Hore ◽  
Sharad Mehrotra ◽  
Nalini Venkatasubramanian
Keyword(s):  
Content Dissemination

scholarly journals Proof-of-Prestige: A Useful Work Reward System for Unverifiable Tasks

2021 ◽  
Vol 21 (2) ◽  
pp. 1-27
Author(s):  
Michał Król ◽  
Alberto Sonnino ◽  
Mustafa Al-Bassam ◽  
Argyrios G. Tasiopoulos ◽  
Etienne Rivière ◽  
...  
Keyword(s):  
Mobile Application ◽  
Reward System ◽  
Fair Exchange ◽  
Content Dissemination ◽  
Collusion Attacks ◽  
Computational Overhead ◽  
Smart Contract ◽  
Memory Footprint ◽  
Vast Range ◽  
Over Time

As cryptographic tokens and altcoins are increasingly being built to serve as utility tokens, the notion of useful work consensus protocols is becoming ever more important. With useful work consensus protocols, users get rewards after they have carried out some specific tasks useful for the network. While in some cases the proof of some utility or service can be provided, the majority of tasks are impossible to verify reliably. To deal with such cases, we design “Proof-of-Prestige” (PoP)—a reward system that can run directly on Proof-of-Stake (PoS) blockchains or as a smart contract on top of Proof-of-Work (PoW) blockchains. PoP introduces “prestige,” which is a volatile resource that, in contrast to coins, regenerates over time. Prestige can be gained by performing useful work, spent when benefiting from services, and directly translates to users minting power. Our scheme allows us to reliably reward decentralized workers while keeping the system free for the end-users. PoP is resistant against Sybil and collusion attacks and can be used with a vast range of unverifiable tasks. We build a simulator to assess the cryptoeconomic behavior of the system and deploy a full prototype of a content dissemination platform rewarding its participants. We implement the blockchain component on both Ethereum (PoW) and Cosmos (PoS), provide a mobile application, and connect it with our scheme with a negligible memory footprint. Finally, we adapt a fair exchange protocol allowing us to atomically exchange files for rewards also in scenarios where not all the parties have Internet connectivity. Our evaluation shows that even for large Ethereum traces, PoP introduces sub-millisecond computational overhead for miners in Cosmos and less than 0.013$ smart contract invocation cost for users in Ethereum.

A Low-Latency Content Dissemination Scheme for mmWave Vehicular Networks

2019 ◽  
Vol 6 (5) ◽  
pp. 7921-7933 ◽  
Author(s):  
Yu Wu ◽  
Li Yan ◽  
Xuming Fang
Keyword(s):  
Vehicular Networks ◽  
Low Latency ◽  
Content Dissemination

Economy driven content dissemination in Delay Tolerant Networks

2014 ◽  
Vol 20 ◽  
pp. 132-149 ◽  
Author(s):  
Faezeh Hajiaghajani ◽  
Yogesh Piolet Thulasidharan ◽  
Mahmoud Taghizadeh ◽  
Subir Biswas
Keyword(s):  
Delay Tolerant Networks ◽  
Content Dissemination ◽  
Delay Tolerant
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