The group held a series of thematic workshops focussing on the areas identified as presenting the highest risk in the National and EU risk assessments. The workshops included presentations by guest speakers from industry, academia and relevant public bodies, as well as detailed technical discussions and submissions, which provided insights on the key risks, challenges, and best practices in the relevant security topics. The workshops resulted in the development by the NCSC of the series of documents known as the Electronic Communications Security Measures or ECSMs. In total, ten ECSMs have been drafted: