Date Published: July 2020 Author(s) Vincent Hu (NIST), Michaela Iorga (NIST), Wei Bao (University of Arkansas), Ang Li (University of Arkansas), Qinghua Li (University of Arkansas), Antonios Gouglidis (Lancaster University) This document presents cloud access control characteristics and a set of general access control guidance for cloud service models: IaaS (Infrastructure as a Service), PaaS (Pla