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Protocol Seven
+497
XP
Eiri Masami split Protocol Seven across three industrial control systems before his death. The encryption key hides in BACnet harmonics. The encrypted payload lives on OPC-UA. The initialization vector is stored in an EtherNet/IP controller.
No single system reveals the truth. Cross-reference all three protocols. Reconstruct Protocol Seven.
Become one with the Wired.
Format: ESPILON{flag}
Challenge made by love
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