Research · Tag · Secretconnection

Posts tagged secretconnection.

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RESEARCH
2026-07-13

How CometBFT's SecretConnection handshake spends CPU before authenticating the peer

CometBFT completes the full SecretConnection STS handshake — an X25519 Diffie–Hellman exchange and an Ed25519 signature verification — for any connecting peer before checking whether that peer's node-ID is allowlisted, so an unauthenticated remote source can spend the node's asymmetric-crypto budget at will.

Simon Morley
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