Protect 30-year-old PLCs from modern replay attacks. Drift Systems acts as a zero-trust gateway, enforcing strict "Time-of-Action" windows and monotonic ordering without requiring a cloud connection.
Attackers often capture valid commands (e.g., "OPEN VALVE") and replay them later to cause damage. This simulator shows how Drift's Sliding State Window rejects these packets automatically.
Instruction: Use "TOGGLE VALVE" to send valid commands. The Gateway accepts them because the state matches. Then, try "REPLAY LAST CMD". The Gateway rejects it because the Sequence/State has already moved forward (Replay) or the time window has closed (Stale).
Drift Gateways sit transparently between the HMI (Operator) and the PLC (Machine). No code changes are required on the legacy endpoint. We wrap standard Modbus/DNP3 packets in a Drift Integrity Envelope.
In safety-critical systems, a command that arrives 2 seconds late can be dangerous. Drift enforces strict Timing Budgets based on state evolution speed, dropping commands that violate the safety window.
If the network is partitioned, Drift enables "Quorum-Based" degrade policies. For example, a substation can switch to local-only control if it cannot verify the freshness of the central command stream.
Every state transition is cryptographically linked to the previous one. This creates an immutable, gap-free log of every control action, mathematically proving who authorized the valve open and exactly when.