A security researcher hired by the ZCash team used Claude, Anthropic's AI assistant, to identify a critical vulnerability that had existed undetected in the ZCash protocol for four years. The full extent of the exploit remains unknown, raising concerns about whether it was previously discovered and potentially abused by malicious actors. ZCash is a privacy-focused cryptocurrency that uses zero-knowledge proofs to shield transaction data, meaning any flaw in its cryptographic layer could have significant consequences for user funds and transaction integrity. The discovery highlights both the growing role of AI tools in blockchain security auditing and the persistent risks of long-standing vulnerabilities in complex cryptographic systems. The ZCash development team has yet to fully disclose the scope or impact of the flaw.
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