A group of security researchers in Israel has discovered vulnerabilities in the Siemens S7 Simatic architecture that ultimately allowed them to build a phony engineering workstation that was able to dupe — and alter — operations of the S7 programmable logic controller (PLC) that runs industrial processes. Eli Biham and Sara Bitan of Technion, and Avishai Wool and Uriel Malin of Tel Aviv University, at Black Hat USA next month in Las Vegas will reveal security weaknesses they found in the newest generation of the Siemens systems and how they reverse-engineered the proprietary cryptographic protocol in the S7.

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