Figure 3 - uploaded by Henning Schulzrinne
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An example exchange of Interest and Data packets to retrieve a Git object that needs to be fragmented. The client generates additional Interests to retrieve missing fragments from Content Store.
Source publication
GRAND is an experimental extension of Git, a distributed revision control system, which enables the synchronization of Git repositories over Content-Centric Networks (CCN). GRAND brings some of the benefits of CCN to Git, such as transparent caching, load balancing, and the ability to fetch objects by name rather than location. Our implementation i...
Context in source publication
Citations
... The hash of any content can be used as its URI (hash functions are one-way collision-free functions; i.e., functions that result in a negligible probability of guessing which input produced an output). Thus, these hash URIs are used in multiple distributed systems such as IPFS to build scalable content-addressable networks [32,[41][42][43]. ...
The current state of the web, which is dominated by centralized cloud services, raises several concerns regarding different aspects such as governance, privacy, surveillance, and security. A way to address these issues is to decentralize the platforms by adopting new distributed technologies, such as IPFS and Blockchain, which follow a full peer-to-peer model. This work proposes a set of guidelines to design decentralized systems, taking the different trade-offs these technologies face with regard to their consistency requirements into consideration. These guidelines are then illustrated with the design of a decentralized questions and answers system. This system serves to illustrate a framework to create decentralized services and applications that uses IPFS and Blockchain technologies and incorporates the discussion and guidelines of the paper, providing solutions for data access, data provenance, and data discovery. Thus, this work proposes a framework to assist in the design of new decentralized systems, proposing a set of guidelines to choose the appropriate technologies depending on the relevant requirements; e.g., considering if Blockchain technology may be required or IPFS might be sufficient.
... The hash 1 of any content can be used as its URI. Thus, these hash URIs are used in multiple distributed systems such as IPFS to build scalable content-addressable networks [3,27,38,42]. Merkle Links and Structures The use of hash values (see previous subsection) to reference data in data structures was first introduced by [37]. Complex data structures can use these links (See Figure 1 for a Merkle structure example). ...
In recent years, the increasing concerns around the centralized cloud web services (e.g. privacy, governance, surveillance, security) have triggered the emergence of new distributed technologies, such as IPFS or the Blockchain. These innovations have tackled technical challenges that were unresolved until their appearance. Existing models of peer-to-peer systems need a revision to cover the spectrum of potential systems that can be now implemented as peer-to-peer systems. This work presents a framework to build these systems. It uses an agent-oriented approach in an open environment where agents have only partial information of the system data. The proposal covers data access, data discovery and data trust in peer-to-peer systems where different actors may interact. Moreover, the framework proposes a distributed architecture for these open systems, and provides guidelines to decide in which cases Blockchain technology may be required, or when other technologies may be sufficient.
