Mustafa Al-Bassam (born January 1995) is a British computer security researcher, hacker, and co-founder of Celestia Labs. Al-Bassam co-founded the hacker group LulzSec in 2011, which was responsible for several high profile breaches. He later went on to co-found Chainspace, a company implementing a smart contract platform, which was acquired by Facebook in 2019. In 2021, Al-Bassam graduated from University College London, completing a PhD in computer science with a thesis on Securely Scaling Blockchain Base Layers. He is currently the CEO of Celestia Labs, a company responsible for building the Celestia blockchain. in 2016, Forbes listed Al-Bassam as one of the 30 Under 30 entrepreneurs in technology.