The Biba model is a security framework designed to maintain data integrity in computer systems. It was developed by Kenneth J. Biba in 1977 and focuses on preventing unauthorized users from altering data. The model uses two main principles: the "simple integrity property," which prevents users from writing to higher integrity levels, and the "star integrity property," which prevents users from reading lower integrity levels. In the Biba model, users and data are assigned integrity levels, ensuring that only authorized personnel can modify sensitive information. This helps organizations protect their data from corruption and maintain trust in their information systems. The model is often used in environments where data accuracy is critical, such as in financial institutions and government agencies.