This independent research manuscript proposes a theoretical neurosecurity framework for Brain-Computer Interfaces (BCIs), titled “Gamma-Wave Dynamic Encryption and Cognitive Firewalling for Brain-Computer Interfaces: A Theoretical Neurosecurity Framework.” The paper introduces a layered Neurosecurity Stack (NSS) composed of Gamma-Wave Dynamic Encryption (GWDE), Cognitive Firewall System (CFS), and Neural Continuity Assurance (NCA). The framework is designed to address emerging BCI security risks