As brain-computer interfaces and cognitive biometrics become operational realities in high-stakes environments, cybersecurity has shifted from protecting digital assets to safeguarding human consciousness itself. The chapter examines the profound ethical, legal, and policy challenges this transition creates. Neural data is uniquely sensitive. Unlike passwords or even conventional biometrics, compromised neural patterns are irreversible, representing an unprecedented and permanent vulnerability, introducing the “neural security paradox,” wherein the same neural data that enables unforgeable authentication simultaneously threatens personal autonomy and mental privacy. A stark global regulatory gap compounds this concern. Addressing these gaps demands constitutional action modeled on emergency regulations against unchecked market proliferation, and internationally harmonized standards. Without robust neuro-rights frameworks and cross-sector collaboration among cybersecurity experts, neuroscientists, engineers, and policymakers, neurotechnology risks transforming from a tool of human enhancement into an instrument of control and subjugation.