This tutorial walks you through the complete process of setting up a local Ethereum node, developing and deploying a Solidity token contract with Truffle, generating Java wrappers using Web3j, and integrating the contract into an Android app to perform transfers and balance queries.
This article examines the current status, strategic importance, and underlying reasons for federated learning and blockchain, compares their similarities and differences, and explores how their complementary strengths can be combined to create trusted, privacy‑preserving, and value‑transfer solutions in the digital economy.
The People's Bank of China has published the JR/T 0184‑2020 Financial Distributed Ledger Technology Security Specification, the country's first blockchain‑related standard for the financial sector, with JD Digital Technology playing a key drafting role and industry experts predicting it will steer the sector away from chaotic growth.
The article presents JD.com’s ZhiZhen Chain blockchain platform, detailing its open‑source JD Chain engine, component‑based architecture, high‑throughput performance, cryptographic innovations, BaaS services, and real‑world applications in supply‑chain traceability, digital evidence, asset‑backed securities, and digital finance, highlighting extensive deployment statistics and future innovation directions.
In this speech, JD Chain chief architect Huang Haiquan discusses three core blockchain questions, JD's blockchain architecture and practice, and introduces the JD Chain open-source project, highlighting use cases such as vaccine traceability and outlining the evolution of next‑generation blockchain architecture.
JD Chain, JD Digital Technology’s open‑source blockchain engine announced in 2019, offers enterprise‑grade features such as modular cryptographic algorithms, pluggable consensus protocols, key‑value ledger model, flexible storage, and comprehensive APIs, aiming to accelerate blockchain adoption across diverse business scenarios.
The article analyses the shortcomings of traditional seller‑driven financial risk data queries and proposes a blockchain consortium that uses distributed ledger, consensus, smart contracts and token‑based pricing to enable fair, secure, and efficient data sharing and settlement among financial institutions.
This article provides a comprehensive overview of blockchain technology, explaining its structure, cryptographic foundations, and how Bitcoin and Ethereum operate, including mining, transaction processes, smart contracts, and ICOs, while also highlighting regulatory concerns and common misconceptions.
This article surveys multiple double‑spend attack vectors discovered on major public blockchains such as Bitcoin, EOS, and NEO, classifies them into verification flaws, VM execution inconsistencies, and consensus weaknesses, and proposes an efficient mitigation method based on write‑operation hashing.
This article explains the fundamentals of Bitcoin wallet key management, covering the relationships between private keys, public keys, and addresses, the different wallet types, and the essential BIP standards (BIP‑0032, BIP‑0039, BIP‑0043, BIP‑0044) that define deterministic key derivation and mnemonic generation.
This article provides a comprehensive overview of Polkadot, explaining its relay‑chain and parachain architecture, cross‑chain interoperability goals, detailed transaction lifecycle across five stages, the nominated proof‑of‑stake (NPoS) consensus mechanism, and the growing ecosystem of applications built on the platform.
This article outlines multiple Ethereum RPC attack techniques—including unlock‑account hijacking, miner‑address manipulation, brute‑force, offline, and zero‑fee attacks—provides detailed attack flow diagrams, code‑path references, recent honeypot statistics, and practical defense measures to secure RPC endpoints.
This article explains how Bitcoin implements a decentralized electronic currency system by combining P2P networking, blockchain ledger structures, cryptographic signatures, proof‑of‑work consensus, and final consistency to achieve secure, tamper‑resistant storage and transaction processing.
This article guides developers through extending a simple Ethereum voting DApp by introducing ERC20 token-based weighted voting, covering token concepts, Solidity contract design with structs and mappings, functions for buying tokens, voting, and fund transfer, as well as deployment, testing, and front‑end integration steps.
This article explains blockchain fundamentals, clears common misconceptions, describes its basic components, outlines the technology’s evolution from 1.0 to 3.0, and highlights current and future application scenarios across various industries.
This article explains blockchain by distinguishing its narrow definition as a cryptographically linked data structure from its broader view as a decentralized infrastructure, and then details blocks, headers, bodies, hash functions, chain structure, Merkle trees, timestamps, asymmetric encryption, P2P networking, data propagation, and validation mechanisms.
This article examines the rapid rise of Web3 phishing, detailing various attack vectors such as transaction‑based phishing, eth_sign blind signing, modal phishing, approval abuse, address‑poisoning, and zero‑transfer tricks, while presenting detection methods and Ant Group’s multi‑dimensional anti‑money‑laundering platform as a countermeasure.
Ant Group’s industrial‑grade ‘YinYu’ privacy‑computing framework, recognized in China’s 2023 Big Data “Star River” case list, powers a joint‑pricing insurance platform that securely integrates AI, big‑data analytics and blockchain to improve new‑energy vehicle insurance pricing, reduce premiums and enhance risk assessment.
The article describes how Ant Group and partners created an accessible online movie platform for visually impaired users in China, employing innovative privacy‑computing, blockchain, and terminal‑security technologies to enable secure, minimal‑disclosure identity verification and protect intellectual‑property rights.
This article provides a detailed forensic analysis of a Flashbots MEV bot attack on Ethereum, describing the underlying PBS protocol flaw, the malicious validator’s multi‑stage preparation, the sandwich‑style exploit, the financial impact, and recommended code‑level fixes to prevent private transaction leakage.