Zakaria El Intissar

I've spent 13 years in power system automation, electrical protection, and SCADA communication, as an automation and industrial computing engineer. ScadaProtocols.com is where I turn what I've learned on site into plain guides and working tools — so other engineers can decode, analyze, and troubleshoot industrial communication protocols without the guesswork.

Author Archives: Zakaria El Intissar

Top 10 ICS Cyber Attacks Explained (Detailed Analysis & Lessons)

Industrial Control Systems (ICS) are increasingly targeted by cyberattacks because they control critical infrastructure and physical processes. These attacks often combine IT tools, malware, and industrial knowledge to achieve their objectives. Stuxnet (2010) The Stuxnet attack was a highly sophisticated cyber operation designed to target industrial systems. It spread through infected USB drives, allowing it to bypass air-gapped… Read More: Top 10 ICS Cyber Attacks Explained (Detailed Analysis & Lessons) »

What is an Information Security Management System (ISMS)? A Practical Guide for Industrial and OT Environments

An information security management system (ISMS) is a documented set of policies, procedures, and controls that an organization uses to manage information security risk in a consistent way. The goal is simple. Protect data, keep operations running, and prove to auditors, customers, and regulators that security is not being handled by guesswork. That definition matches what you’ll read… Read More: What is an Information Security Management System (ISMS)? A Practical… »

ISO/IEC 27001 for EMS: Energy Management System Cybersecurity Guide

Energy Management Systems (EMS) are critical to modern infrastructure, managing energy generation, distribution, and consumption. As these systems become increasingly connected to IT networks, they face growing cybersecurity risks. Implementing ISO/IEC 27001 (2022 version) enables organizations to establish a structured Information Security Management System (ISMS) that protects EMS environments through risk management, security controls, and continuous improvement. For… Read More: ISO/IEC 27001 for EMS: Energy Management System Cybersecurity Guide »

PROFIBUS DP Protocol: Complete Technical Guide

PROFIBUS DP (Decentralized Periphery) is a serial fieldbus communication protocol designed for fast, deterministic data exchange between a central controller and distributed field devices — I/O modules, drives, sensors, actuators, and remote terminal units. It is the dominant variant of PROFIBUS and the backbone of tens of millions of installed automation systems worldwide. In the IEC standards framework,… Read More: PROFIBUS DP Protocol: Complete Technical Guide »

OPC UA Information Model Explained: Types, Nodes, References, and Design Guide

Most industrial protocols just move numbers. Register 40001 gives you 42.5 — and that’s it. You need a separate spreadsheet to know it’s a temperature, in Celsius, from Tank 01, with an alarm limit at 80°C. OPC UA works differently. It doesn’t just carry data — it carries the meaning of that data. The structure, relationships, types, units,… Read More: OPC UA Information Model Explained: Types, Nodes, References, and Design… »

OPC UA Services Explained: The Complete Guide to All 10 Service Sets

OPC UA services are the operations that make everything happen. When a client reads a temperature value, subscribes to alarms, calls a method on a remote machine, or browses a server’s data structure — it’s using OPC UA services. Services are defined in IEC 62541 Part 4. They’re abstract — meaning the standard describes what each service does… Read More: OPC UA Services Explained: The Complete Guide to All 10… »