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Key Takeaways
- Live on Ethereum mainnet since September 30.
- Protocol default: 1,000 payments per hash chain.
- Front-running flaw found and fixed on October 21.
The founder, who posts as Hadamard, described the design in an October 24 Ethereum Research post and asked for critical feedback.
Ordinary Ethereum accounts authorize transactions with ECDSA signatures, which a large enough quantum computer running Shor’s algorithm could break. No machine today can do that, but warnings about exposed wallet keys have pushed developers to look for alternatives. BB84, an OP Stack rollup on Ethereum mainnet with chain ID 42069000, removes signatures from its network altogether.
Each account is built from a secret that is hashed over and over with keccak-256, creating a chain of values. Only the last value is public. To pay...
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