VectorCertain LLC today announced the completion of manuscript preparation for The MYTHOS Playbook, a comprehensive technical reference designed to help CISOs, security architects, and AI governance program leads implement the joint Five Eyes guidance on agentic AI security. The 34-chapter, nine-appendix book, set for June 2026 publication, provides operational depth that policy-level documents lack.
The Five Eyes guidance, ‘Careful Adoption of Agentic AI Services,’ was published May 1, 2026, by CISA, NSA, Australia’s ASD ACSC, the Canadian Centre for Cyber Security, NZ NCSC, and UK NCSC. It identifies five risk classes: privilege, design and configuration, behavioral, structural, and accountability. According to the guidance, agentic AI systems increasingly operate across critical infrastructure and defense sectors, and organizations should assume these systems may behave unexpectedly until security practices mature.
The urgency behind the guidance is underscored by market data. Gartner projects AI agents will be embedded in 40% of enterprise applications by the end of 2026. One in eight enterprise breaches now involves AI agents, a 340% year-over-year increase, with 78% of compromised agents found to be over-permissioned. Analysis of 18,470 production agent configurations found 98.9% lack deny rules entirely.
The MYTHOS Playbook claims to be the only technical reference that operationalizes all five Five Eyes risk classes at chapter depth. Its Part II Architecture addresses privilege and design risks with a five-layer governance pipeline. Part III Vectors covers behavioral threats through a seven-vector taxonomy. Part V SOC/Detection and Chapter 8’s compositional safety model target structural risks. Appendices provide accountability mechanisms including hash-chained audit records and a 12-clause vendor RFP language library.
The book’s detection methodology rests on Clopper-Pearson exact binomial confidence intervals computed across 7,000 adversarial scenarios, achieving 100% recall and a 3-sigma lower bound of at least 99.65%. A 119-cell framework cross-walk in Appendix C maps Five Eyes risk classes to NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS.
Joseph P. Conroy, founder and CEO of VectorCertain, said the Five Eyes did the hard policy work establishing agentic AI risk as a national-security-grade concern. The MYTHOS Playbook is the operational complement: a technical reference a CISO can hand to a security architect for deployment-depth enforcement.
The manuscript was structurally complete before the Five Eyes guidance was published, with drafting starting in 2025. Conroy noted that the Playbook’s risk taxonomy converged independently with the Five Eyes framework, which he called the strongest validation of both documents.
The book is built on VectorCertain’s SecureAgent platform, which has logged 14,208 internal trials with zero failures and a false-positive rate of 1 in 160,000. The patent portfolio underlying the architectural commitments includes 55 patents valued between $285 million and $1.55 billion.
For critical infrastructure CISOs navigating the new Five Eyes requirements, The MYTHOS Playbook aims to bridge the gap between policy intent and implementation. Pre-order interest registration is open at vectorcertain.com.
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