00Abstract
The identity security industry has invested heavily in threat detection (SIM-swap monitoring, number-porting alerts, carrier fraud signals), yet a critical gap persists between identifying a threat and protecting the affected user. Detection, no matter how fast or accurate, does not constitute response. This whitepaper introduces Identity Threat Response as a Service (ITRaaS), a model that eliminates the manual orchestration bottleneck by coupling carrier signal ingest with deterministic, policy-driven remediation.
We describe the three-pillar architecture underpinning PasskeyBridge (network attestation, verifiable credentials, and biometric binding) and demonstrate how their convergence produces an auditable trust chain resistant to the class of attacks that single-pillar systems cannot address. We detail the platform's credential lifecycle management, including batch VP Token verification and StatusList2021 auto-refresh with conditional caching, which enable high-throughput credential verification at scale.
We further present the zero-PII data model; the production-deployed post-quantum cryptographic implementation aligned with NIST FIPS 204 and the agency's post-quantum transition guidance (NIST IR 8547); the Seed & Stretch entropy architecture bridging classical and quantum-era key material; the A2A Horizontal Trust Protocol for autonomous inter-agent trust negotiation; the physics-layer trust infrastructure spanning Provenance Guard, BLAST tunnels, Parametric Revocation Cascade, and Recursive Entropy Chaining; and the observability and human-in-the-loop review pipelines that provide operational visibility without exposing PII.
The paper also introduces three emerging constructs: the Physics-Anchored Identity Settlement Token (PBPIST) model, the Relativistic Kinematic Space-Time Authentication (PBSTA) protocol that treats the LEO Doppler curve as a cryptographic challenge, and the Purpose-Bound PII Vault (PBPBV) with dual-path cryptographic erasure. Four industry verticals are explored in depth. The methods described herein are protected by sixteen patent filings, anchored by U.S. Application No. 19/553,357, and implement parametric identity revocation triggered by real-time carrier signals and bound to device-level biometrics through WebAuthn passkeys—operational in our production environment today.
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