Blockchain

Hadamard (BB84)

Consensus: Quantum-Vulnerable
Why this rating. The OP Stack sequencer is unchanged. Batch-submission and output-proposal keys use ECDSA, which the project's own security table lists as vulnerable, future work.
Transactions: Post-Quantum
Why this rating. Live OP Stack L2 where the BB84 hardfork disables ECDSA transactions. Spend authorization is a keccak256 hash-chain preimage reveal, in a commit then reveal pair.
Algorithms: None listed
Website: Website
Source: Source
Note and links: Batcher and proposer use ECDSA
BB84 developer docs and security model

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