Enlarge (credit: Aurich Lawson | Getty Images) This is a story about how a simple software bug allowed the fourth-biggest cryptocurrency theft ever. Hackers stole more than $323 million in cryptocurrency by exploiting a vulnerability in Wormhole, a Web-based service that allows inter-blockchain transactions. Wormhole lets people move digital coins …

Enlarge (credit: Getty Images ) Blockchain startup MonoX Finance said on Wednesday that a hacker stole $31 million by exploiting a bug in software the service uses to draft smart contracts. The company uses a decentralized finance protocol known as MonoX that lets users trade digital currency tokens without some …