Evaluation of OPC UA secure communication in web browser applications

摘要: OPC UA XML Web services mapping offers a service interface to access process data. use technology for data exchange. Present-day browsers include functionality already as standard feature, they are therefore very promising candidates the implementation of monitoring and operating functions industrial processes. However, acceptance in automation depends on adequate security realizations. For this purpose, stack provides several specifications meet requirements secure message The refers these specifications. application technical processes using demand computation cryptographic algorithms within scripting engine browser. available languages not designed compute complex mathematical, i.e., cryptographic, algorithms. Therefore, at Institute Automation Technische Universitat Dresden suitability native browser with based communication was analyzed. paper shows representative measured computing times JavaScript. specification signature - which is mandatory requires about 700 ms create signature. Finally, discusses methods improve performance.