RT Article T1 Introducing and Exploring the Extremist Cybercrime Database (ECCD) JF Crime & delinquency VO 69 IS 12 SP 2411 OP 2436 A1 Holt, Thomas J. 1978- A2 Chermak, Steven M. 1964- A2 Freilich, Joshua D. A2 Turner, Noah A2 Greene-Colozzi, Emily LA English YR 2023 UL https://krimdok.uni-tuebingen.de/Record/1869155238 AB This study uses open source, public information to examine nation-state and non-nation-state ideologically motivated cyberattacks performed against US targets from 1998 to 2018. We created the Extremist Cyber Crime Database (ECCD) that includes scheme, offender and target codebooks to address gaps in existing research and better inform policymakers. We describe our open source collection procedures, the type of information uncovered, and how we assessed their quality and reliability. We highlight our findings, compare these extremist cyber-crimes to extremist real world violence, and discuss their conceptual and policy implications. K1 Cybercrime K1 Cyberterrorism K1 Extremism K1 Hacking K1 Terrorism DO 10.1177/00111287221083899