Chicago Public Schools fell victim to a ransomware attack that compromised the personal information of more than half a million of its staff and students. A server used to store student and staff information was breached and records of more than four years were compromised in the attack. The compromised information included students’ names, schools, dates of birth, gender, CPS identification numbers, state student identification numbers, class schedule information and scores on course-specific assessments as well as employee identification numbers, school and course information, emails and usernames. The school along with FBI and Department of Homeland Security investigated the incident.