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Доклад разработчиков Exonum на третьем митапе сообщества блокчейн-разработчиков Санкт-Петербурга

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Дмитрий Плахов

This document discusses using the Exonum framework to build blockchain-driven web applications. Exonum is an extensible framework that allows building blockchain projects using a Byzantine Fault Tolerant algorithm, light clients, anchoring to hashes, and the Rust programming language. It describes how a traditional web application architecture relies on a centralized admin, whereas a blockchain-driven one using Exonum distributes trust across multiple nodes reaching consensus. Users would authenticate using public/private key pairs and directly control and sign transactions to modify their own data on the blockchain, improving security, transparency and fault tolerance compared to traditional architectures.

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Blockchain for Web-Applications DenisKolodin AlekseySidorov
Blockchain for Web-Applications 2 Exonum is an extensible framework for blockchain projects What is Exonum? • BFT Algorithm • Light Client • Anchoring • Rust
Blockchain for Web-Applications 3 Traditional Web-Application Architecture Admin is a King: • Can change any data • Can lose sensitive data • Absolute faith a server or two maybe...
Blockchain for Web-Applications 4 AWSAzureGCE Office Blockchain-driven Web-Application Architecture Exonum Node 1 Exonum Node 2 Exonum Node 3 Exonum Node N CONSENSUS
Blockchain for Web-Applications 5 Key pair User Authentication Public Key Private Key Exonum Node Transaction Only user modifies data. Signed User doesn’t need to pass special registration process. User creates own key pair
Blockchain for Web-Applications 6 Offline signing of transactions Create and sign transaction offline… Exonum Node and send it to Exonum Node (by another device) Only owners can change their data (depends on business logic)
Blockchain for Web-Applications 7 Exonum Node 1 Exonum Node 2 Exonum Node 3 Exonum Node N Fault! Exonum Node 3.1 CONSENSUS Fault tolerance, hardware updates, scaling Audit Node 1 Audit Node 2 Scaling up throughput
Blockchain for Web-Applications 8 Proofs are the core of integrity Exonum contains merkle-tree indices to maintain proofs • Data “fingerprints” • Shared confidence • Digital law enforcement
Blockchain for Web-Applications 9 Service Data Keys Transactions Implement all necessary services (contracts) with Exonum framework Add light client to browser application and let users derive protected keys. Configure the web-server to pass transaction to Exonum Node Migrate initial data to blockchain with a genesis block. Launch! Deploy Exonum Nodes and enjoy the blockchain in your application! Integrate to existent Web-Application
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Доклад разработчиков Exonum на третьем митапе сообщества блокчейн-разработчиков Санкт-Петербурга

  • 2. Blockchain for Web-Applications 2 Exonum is an extensible framework for blockchain projects What is Exonum? • BFT Algorithm • Light Client • Anchoring • Rust
  • 3. Blockchain for Web-Applications 3 Traditional Web-Application Architecture Admin is a King: • Can change any data • Can lose sensitive data • Absolute faith a server or two maybe...
  • 4. Blockchain for Web-Applications 4 AWSAzureGCE Office Blockchain-driven Web-Application Architecture Exonum Node 1 Exonum Node 2 Exonum Node 3 Exonum Node N CONSENSUS
  • 5. Blockchain for Web-Applications 5 Key pair User Authentication Public Key Private Key Exonum Node Transaction Only user modifies data. Signed User doesn’t need to pass special registration process. User creates own key pair
  • 6. Blockchain for Web-Applications 6 Offline signing of transactions Create and sign transaction offline… Exonum Node and send it to Exonum Node (by another device) Only owners can change their data (depends on business logic)
  • 7. Blockchain for Web-Applications 7 Exonum Node 1 Exonum Node 2 Exonum Node 3 Exonum Node N Fault! Exonum Node 3.1 CONSENSUS Fault tolerance, hardware updates, scaling Audit Node 1 Audit Node 2 Scaling up throughput
  • 8. Blockchain for Web-Applications 8 Proofs are the core of integrity Exonum contains merkle-tree indices to maintain proofs • Data “fingerprints” • Shared confidence • Digital law enforcement
  • 9. Blockchain for Web-Applications 9 Service Data Keys Transactions Implement all necessary services (contracts) with Exonum framework Add light client to browser application and let users derive protected keys. Configure the web-server to pass transaction to Exonum Node Migrate initial data to blockchain with a genesis block. Launch! Deploy Exonum Nodes and enjoy the blockchain in your application! Integrate to existent Web-Application