The Bastion CorpSec Neural Fortress is a Tier 4 security-hardened BCI engineered by TESSERA CORPONATION for deployment in elite corporate security divisions and executive protection units. Built around a triple-redundant AES-512 encryption core with quantum-resistant key rotation every 3.7 seconds, the Bastion integrates a dedicated threat-cognition co-processor that overlays real-time biometric threat assessment onto the wearer's visual field. Its neural architecture includes a hardware-level kill switch that renders all stored operational data irretrievable upon unauthorized access attempts, and a passive signal-dampening mesh that prevents remote interrogation of neural traffic. The installation footprint spans three cortical anchor points and requires a Class IV surgical suite with full neural mapping pre-operative workup.

Within TESSERA CORPONATION's internal security hierarchy, wearing a Bastion is a visible mark of rank—CorpSec personnel who have been issued one are informally referred to as 'Walled' by their peers, a term carrying equal parts respect and wariness. The unit's distinctive low-frequency carrier hum, barely perceptible to augmented hearing, has become something of a calling card in corporate espionage circles: rival operatives know that a 'Walled' target is nearly impossible to compromise neurologically. On the streets, decommissioned Bastions stripped from fallen CorpSec operatives command enormous black-market premiums, though most self-destruct before extraction is complete.