最新报道:Bitcoin's blockchain experienced a significant denial-of-service (DoS) attack in 2015, exploiting a vulnerability in the network's transaction processing. The attack flooded the network with tiny transactions, clogging mempools and slowing confirmations. Core developers responded by implementing stricter validation rules in Bitcoin Core 0.11.2 to prevent similar spam attacks. This incident highlighted early scalability challenges and the importance of continuous protocol improvements to maintain network stability against malicious actors. The solution set important precedents for Bitcoin's security approach, demonstrating how the open-source community can rapidly address emerging threats through coordinated upgrades.