An important facet of securing an Oracle Database is the ability to audit. Auditing has now become extremely important as it is a requirement of an increasing set of regulations governing the use of database data. this talk will cover a range of auditing techniques that can be used on Oracle including the default System-based auditing, fine-grained auditing, trigger-based auditing, flashback techniques and flashback data archive. Examples of each will be provided along with a discussion of their effect on performance and storage requirements.