VectorCertain LLC today announced the completion of manuscript-prep for The MYTHOS Playbook, a 34-chapter, 9-appendix technical reference designed for CISOs, security architects, and AI governance program leads operationalizing the new joint Five Eyes guidance on agentic AI security. The book closes its 17-sprint development cycle today and proceeds to June 2026 publication. A pre-order landing page is live at vectorcertain.com.
On May 1, 2026, six national cybersecurity agencies representing all five Five Eyes nations—CISA, NSA, Australia's ASD ACSC, the Canadian Centre for Cyber Security, NZ NCSC, and UK NCSC—jointly published "Careful Adoption of Agentic AI Services" (CISA). It identifies five risk classes: privilege, design and configuration, behavioral, structural, and accountability. The guidance states that "Agentic artificial intelligence (AI) systems increasingly operate across critical infrastructure and defense sectors and support mission-critical capabilities" (Five Eyes Joint Guidance).
One in eight enterprise breaches now involves AI agents—a 340% year-over-year increase, with 78% of compromised agents over-permissioned (Digital Applied). The MYTHOS Playbook maps every risk class to specific chapters. For privilege risks, Part II (Chapters 4-12) delivers patent-form least-privilege architecture across MRM-CFS-SG governance gates. Behavioral risks are addressed in Part III with a seven-vector threat taxonomy validated across 7,000 adversarial scenarios achieving ≥99.65% 3-sigma confidence (Clopper-Pearson).
Appendix C provides a 119-cell cross-walk matrix mapping Five Eyes risk classes to NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS. Appendix G offers a 12-clause vendor RFP language library for procurement. The Playbook also includes hash-chained audit records (Appendix F) and statistical detection methodology (Part IV).
Joseph P. Conroy, Founder and CEO of VectorCertain, said: "The Five Eyes did the hard policy work. The MYTHOS Playbook is the operational complement—the technical reference a CISO can hand to a security architect. The convergence between our independently derived risk taxonomy and the Five Eyes guidance validates both documents."
The Playbook is built on SecureAgent, VectorCertain's AI Agent Security platform, which has logged 14,208 internal trials with zero failures and a false-positive rate of 1 in 160,000 (VectorCertain Internal). The patent portfolio includes 55 patents valued at $285M–$1.55B.
Pre-order interest registration is open at vectorcertain.com.
