PACTF is a web-based computer security competition for middle and high school students. It was founded by a group of students at Phillips Academy in Andover, Massachusetts. The competition's sponsors include the Abbot Academy Association at Phillips Academy; the Information Networking Institute and CyLab at Carnegie Mellon University; the Hariri Institute for Computing, Massachusetts Open Cloud (MOC) project, and Modular Approach to Cloud Security (MACS) project at Boston University; and other entities.