Secure Shield by Block Armour is a Zero Trust security platform designed for hybrid and distributed enterprise IT environments. It utilizes Software Defined Perimeter (SDP) architecture and private permissioned Blockchain technology to provide holistic Zero Trust security. The platform is aligned with the NIST Zero Trust Framework and employs Blockchain-based digital signatures for device identification, authentication, and authorization. Secure Shield offers micro-segmented network access to business applications, both on-premises and in the Cloud, securing servers, enhancing user authentication, and encrypting communication between users and servers.