BlastShield is a cybersecurity solution that creates a software-defined perimeter (SDP) and zero-trust network access (ZTNA) environment to protect critical systems and data by making them invisible and inaccessible to unauthorized users. It combines encrypted peer-to-peer connectivity, passwordless multi-factor authentication (MFA), and micro-segmentation to secure remote access, prevent lateral movement by attackers, and safeguard both IT and OT/IoT assets.