The rise of AI-powered impersonation—ranging from synthetic voice deepfakes to algorithmically generated messages—poses a critical threat to government, defense, and national infrastructure. A recent incident involving an AI-generated impersonation of a U.S. Secretary of State underscores the urgency of this threat. State-sponsored actors are increasingly exploiting consumer-grade messaging apps including Signal to infiltrate secure channels, extract sensitive data, and disrupt operations. These platforms, designed for mass-market use, lack the hardened security architecture required to withstand sophisticated AI-driven attacks. Their infrastructure, often reliant on commercial cloud services leaves...