# Big data security You can choose between two methods of implementing big data security. The security and protection of sensitive data is a major concern of data management today. To assist users in protecting their data, Pentaho provides two methods of implementing security for the Pentaho Server: Kerberos authentication and secure impersonation. Both methods are secure, and require a user to provide proof of identity to securely connect to a cluster. Also see [Pentaho and CDP security](/pdia-admin/secure-the-pentaho-system/big-data-security/pentaho-and-cdp-security-big-date-security.md) if you are using a Knox security gateway along with Kerberos authentication for your Cloudera Data Platform (CDP) cluster. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pentaho.com/pdia-admin/secure-the-pentaho-system/big-data-security.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.