Abstract: A system and method for disguising and de-identifying data is provided. Records are extracted from an input data set containing confidential information (e.g., a production database). One or more data transformation algorithms for disguising specific types of data, including first names, last names, company names, telephone numbers, addresses, social security numbers, and e-mail addresses, in addition to generic data, are applied to the records to disguise or “scrub” confidential information therefrom. The transformation algorithms retrieve substitute information from one or more lookup tables, or generate substitute information using in-memory manipulation rules, and produce output records containing the substitute information. The output records are structurally similar to the input records, contain no confidential information, and are stored in an output data set that can be utilized in less-secure (e.g., non-production) environments.