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DARPA Selected Xint for Military AI Security Research

The agency commissioned Xint to secure military messaging apps against eavesdropping using autonomous analysis.

Updated on Sept. 29, 2026 in Cybersecurity

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DARPA has commissioned Xint to develop autonomous AI tools designed to secure military messaging applications against foreign eavesdropping threats. AI Illustration. Upload story photo >

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In September 2026, DARPA selected Xint, a company that emerged from Theori, to research autonomous AI-driven application security. The selection followed Xint's status as one of three winners in the two-year, $29.5 million Artificial Intelligence Cyber Challenge.

Why it matters

The project aims to secure Department of War messaging systems against external and foreign eavesdropping threats. This development accelerates the integration of autonomous tools into high-stakes defense software supply chains.

Xint employs frontier LLM models as a harness to perform automated analysis of both source code and compiled binaries. The system reverse engineers binaries to inspect all components between an application and the kernel.

The players

DARPA

The agency responsible for the development of emerging military technologies for the United States.

Xint

A cybersecurity firm that provides autonomous software analysis services for commercial and government sectors.

Theori

A research-focused cybersecurity organization that served as the incubator for Xint.

The details

Xint functions as a software-as-a-service solution that automates the identification of security flaws by mapping the full execution stack. By analyzing the path from the application layer down to the kernel—the core component of an operating system—the platform identifies risks that traditional static analysis might overlook. The company plans to evolve this technology into an on-premises version capable of running entirely within a customer's private data center.

Timeline

  1. 1958: DARPA was established.

  2. September 2026: Xint launched a new software supply chain service.

The Tech Race

Xint's role in the DARPA Artificial Intelligence Cyber Challenge established it as a frontrunner among the three winners tasked with automating code security. This move signals a shift toward using large-scale model-based frameworks to handle binary analysis that was previously manual and error-prone.

While the current engagement focuses on specialized military messaging, Xint already offers a commercial SaaS solution for assessing software supply chain risk. The company's future roadmap includes a private, data-center-compatible version intended for organizations requiring strict data residency.

The takeaway

DARPA is moving to automate application security to outpace foreign threats to military communications. Future milestones to watch include the rollout of Xint's on-premises security suite, which will reveal the feasibility of deploying these autonomous research tools into private enterprise environments.

Further reading

For more on how defense agencies are leveraging autonomous tools, visit Cybersecurity.

Source note: This article includes information reported by SecurityWeek.

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