Reseller News Join Reseller News Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.Sign up now What is Mitre D3FEND? A new knowledge graph for cyber security defenders The Mitre D3FEND matrix explains terminology of defensive cyber security techniques and how they relate to offensive methods. Credit: Dreamstime D3FEND is a new schema released by Mitre last month to establish a common language to help cyber defenders share strategies and methods. It is a companion project to the company’s ATT&CK framework. While complementary, the two projects are very different.