[IEEE 2018 17th IEEE International Conference On Trust, Security And Privacy In Computing And Communications/ 12th IEEE International Conference On Big Data Science And Engineering (TrustCom/BigDataSE) - New York, NY, USA (2018.8.1-2018.8.3)] 2018 17th IEEE International Conference On Trust, Security And Privacy In Computing And Communications/ 12th IEEE International Conference On Big Data Science And Engineering (TrustCom/BigDataSE) - Concepts for Trust Propagation in Knowledge Processing Systems - A Brief Introduction and Overview