Detecting Double-Spend Bugs in API Exchanges Using Multithreaded Tests

This article explains the concept of a “double‑spend” bug encountered during a coin‑exchange API, describes a multithreaded testing approach in Java to reproduce the issue, analyzes the root cause of non‑atomic balance checks, and provides sample code illustrating the detection and prevention method.

API testingBackendJava

0 likes · 8 min read

Detecting Double-Spend Bugs in API Exchanges Using Multithreaded Tests

360 Tech Engineering

Nov 21, 2018 · Blockchain

Double-Spend Attacks on Major Public Blockchains: Vulnerabilities and Mitigation

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.

ConsensusEOSNEO

0 likes · 22 min read

Double-Spend Attacks on Major Public Blockchains: Vulnerabilities and Mitigation

Qunar Tech Salon

Mar 30, 2018 · Blockchain

Understanding Double‑Spend Attacks and Bitcoin’s SPV Mechanism

The article explains what a double‑spend attack is, illustrates it with a concrete example, and describes how Bitcoin prevents such attacks through its blockchain ledger, Simplified Payment Verification (SPV) and Bloom‑filter techniques, highlighting the low data requirements for lightweight nodes.

BitcoinBlockchainSPV

0 likes · 8 min read

Understanding Double‑Spend Attacks and Bitcoin’s SPV Mechanism