How is application whitelisting different from application blacklisting?

Application whitelisting is a security approach that allows only pre-approved applications to execute

within a system or network. This method operates on a ‘default deny’ principle, meaning if an

application is not explicitly listed as approved, it will not be allowed to run. This is in contrast to

application blacklisting, which operates on a ‘default allow’ principle where all applications are

allowed to run unless they have been specifically identified as malicious or undesirable and added to

a blacklist. Whitelisting is generally considered more secure because it prevents any unapproved

applications from running, which can include new or unknown threats. However, it can be more

challenging to maintain as it requires a comprehensive understanding of all the necessary

applications for business operations.

Reference: The concept of application whitelisting and its differentiation from blacklisting is well-

documented in cybersecurity literature and aligns with the guidelines provided by the EC-Council’s

Certified Network Defender (CND) program. It is also supported by various cybersecurity frameworks

and best practices, including those from authoritative sources such as the National Institute of

Standards and Technology (NIST).