CISA published its first detailed guide on cyber decoys, moving the idea from concept to a practical playbook for critical infrastructure and smaller security teams. The document covers fake accounts, files, breadcrumbs, tripwires, honeytokens, and honeypots, and says they can be deployed without major architectural change.
The basic trick is simple: place plausible bait where real users should not touch it, then treat any contact as a high-confidence alert. CISA’s target problem is the kind of intrusion that uses stolen credentials, native admin tools, and living-off-the-land techniques, which often blend into normal logs until an attacker has already moved around.
For defenders that already rely on identity, endpoint, or data-loss controls, the shift is not a new category of tooling but a cheaper signal layer. The guidance matters because it lowers the barrier for teams that could not previously afford deception-heavy monitoring, and it assumes compromise is already a live condition inside the network.
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Making decoys cheap and practical gives smaller teams a way to spot credential-based and living-off-the-land intrusions earlier.