Application security refers to security measures that are implemented at the application level. It is the process of developing and testing security features within applications’ code to prevent security vulnerabilities such as unauthorized data access and modification. This involves programmed functions in the application that aim to prevent data or code from being stolen when the application is being used. It includes all the security considerations that are defined during application development and design, but it also involves the application’s interaction with systems and approaches to security for applications after they get deployed.
Security for applications may be implemented in hardware, software and procedures that identify and control security vulnerabilities. Routers that deny requests to view a computer’s IP address received through the internet is an example of hardware application security. Security measures at the application level typically built into the software functions, such as a firewall that strictly defines what user functions are allowed and prohibited.