HMAC

Named by 3 kept items in this workspace.

2 items name it under tools and 1 under classification.key entities.

Search every workspace for HMAC. It matches the name as written, so it can find other things that share it.

The items that name it 3

Agentic AI Defense: Decode-Time Provenance Binding for MCP
paperas classification.key entities2026-10-22
SequenceHash: multihashing for the rest of us
writeupas tools2026-10-02
Keyed-hash message authentication code; cited as the model/analogue for SequenceMAC's design; noted as subject to key pseudocollision and key extension issues that SequenceMAC addresses
Brief independent investigation of agents’ behavior, reasoning and collaboration in the OpenAI / Hugging Face hacking incident
writeupas tools2026-08-26It is written here as HMAC (hash-based message authentication code).
Used to generate task flags; agents reverse-engineered it to produce flags for any task

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