Advances in neuroimaging and data analysis are making it increasingly possible to probe and gather intelligence from individual minds without their cooperation. This shift suggests we are moving towards a reality where human thought may no longer be considered entirely private. The ability to read, write to, and analyze brain activity aligns with Measurement and Signals Intelligence (MASINT) practices, highlighting the need for discussions on the ethical and practical implications of neurosecurity, as this field evolves alongside cybersecurity.