Power BI implements a wide range of security practices to keep users’ data secure, including user authentication, data and service security, and TLS version usage. Data security, in turn, comes on different levels. Row-level security limits a user’s ability to access certain data. It means that once you define filters within roles, these restrict access at the row level. Object-level security allows you to secure particular tables from report viewers. Moreover, you may select an isolation level that establishes the level of separation required between one data source and other sources.