Voice Security Operations & Release ReadinessStep 09A Hardened
Enterprise Zero-Trust Voice Defense, Cryptographic Webhook Validation, Media Buffer Guards & Release Gate
LIVE PSTN CALLING: DISABLED
Safety Envelope Active: Step 09A performs production hardening, threat modeling, and reliability audits. Live carrier dialing to public PSTN networks remains strictly blocked. All carrier capabilities classified as
LIVE_PSTN_NOT_VERIFIED.Security Posture Score
100%HARDENED
10 of 10 findings verified & remediated
Release Gate State
READY_FOR_CONTROLLED_PILOT
14/14 release criteria evaluated (100% compliance)
Open Criticals
0Target: 0
0 open critical/high vulnerabilities
Emergency Stop
ARMED & PERSISTENT
Redis 30-day persistent safety key active
Hardened Voice Defense Architecture
Zero-Trust Authentication & Tenant Isolation
Client-supplied workspaceId strictly overridden by verified server context. Cross-tenant IDs rejected with 403.
Timing-Safe Cryptographic Webhooks
Twilio HMAC-SHA1 signatures validated via timingSafeEqual. Distributed Redis nonce cache stops replay attacks.
Untrusted Caller Speech & Prompt Injection Shields
Transcripts scanned for adversarial patterns, delimited in untrusted tags, and tools blocked upon injection detection.
Media Stream Bounds & Memory Backpressure
64KB frame size caps, 512KB buffer thresholds, and 180s session ceilings prevent DoS and memory leaks.
Telephony Carrier Sandbox Diagnostics
Carrier Provider:Twilio REST API
Account Tier:Trial (Restricted Sandbox)
Provisioned Inbound Numbers:0 phone numbers
Accounts API Diagnostics Ping:HTTP 200 OK (LIVE_CARRIER_API_VERIFIED)
Live PSTN Calling Status:BLOCKED (LIVE_PSTN_NOT_VERIFIED)