Mysten Labs CTO Steps Down to Lead AI Security Research at Anthropic

Mysten Labs Leadership Transition

According to an announcement from Mysten Labs, Sam Blackshear, the co-founder and chief technology officer, is stepping down from his position to pursue defensive security research at Anthropic. As a key figure who helped establish the company alongside four veterans from Meta in September 2021, Blackshear has been instrumental in developing the Sui blockchain, one of several major layer-one platforms competing in the broader cryptocurrency ecosystem. His departure represents a significant leadership transition for the organization, with Evan Cheng, another co-founder and the chief executive officer, now assuming responsibility for charting Mysten’s technical direction and shaping the platform’s future development.

AI Reshaping the Security Landscape

Blackshear highlighted that the technology sector is experiencing a fundamental shift in how artificial intelligence impacts cybersecurity dynamics. The competitive balance between those attempting attacks and those defending systems is being redrawn by increasingly sophisticated AI capabilities. Advanced systems are being leveraged to uncover software weaknesses, automate large-scale phishing and deceptive campaigns, and target the foundational infrastructure supporting blockchain networks worldwide. The accelerating pace at which AI can identify and potentially exploit vulnerabilities has become a critical concern across the cryptocurrency industry. This evolving threat environment directly motivated Blackshear’s decision to focus his technical expertise on building stronger defensive mechanisms at Anthropic, where he can work on security research during a period when the stakes are particularly high for both the blockchain community and the broader technology landscape.

Maintaining Ecosystem Involvement

Despite transitioning out of his operational role at Mysten, Blackshear intends to maintain close ties with the organization and the community he helped build. He will continue serving as an advisor to Mysten Labs and remains committed to supporting the broader Sui ecosystem through his continued engagement with the Move Foundation, a developer-focused initiative. Blackshear emphasized that throughout his career, he has found the greatest fulfillment in pursuing hands-on technical work while exploring new problem domains—a pattern his Anthropic role allows him to continue in an expanded context.

The departure of a prominent blockchain technologist to focus specifically on AI security reflects broader industry concerns about emerging threats to decentralized infrastructure. As artificial intelligence becomes increasingly powerful and accessible, both legitimate security researchers and potential adversaries have unprecedented tools for identifying and potentially exploiting vulnerabilities across blockchain systems. Blackshear’s strategic move to join Anthropic signals that addressing these challenges requires dedicated expertise, substantial resources, and cross-industry collaboration. This shift underscores that AI security will determine which blockchain platforms can survive and thrive in an increasingly sophisticated threat environment.

Source: Mysten Labs, via Cointelegraph. Not financial advice.