<?xml version="1.0" encoding="utf-8"?>
<rfc version="3" category="std" docName="draft-singh-psi-00" ipr="trust200902" submissionType="IETF" xml:lang="en" xmlns:xi="http://www.w3.org/2001/XInclude">
  <front>
    <title abbrev="PSI Protocol">Proof of Sovereign Integrity (PSI): A Cryptographic Protocol for Verifiable AI Regulatory Compliance</title>
    <seriesInfo name="Internet-Draft" value="draft-singh-psi-00"/>
    <author fullname="Kawaljeet Singh" initials="K." surname="Singh">
      <organization>Apex Intelligence Empire</organization>
      <address>
        <postal>
          <city>Balaclava</city>
          <region>Victoria</region>
          <country>Australia</country>
        </postal>
        <email>kawaljeet.singh3008@gmail.com</email>
        <uri>https://apex-infrastructure.com</uri>
      </address>
    </author>
    <date year="2026" month="3" day="17"/>
    <area>General</area>
    <workgroup>Network Working Group</workgroup>
    <keyword>AI</keyword>
    <keyword>Compliance</keyword>
    <keyword>Cryptography</keyword>
    <keyword>ZK-SNARK</keyword>
    <abstract>
      <t>This document specifies the Proof of Sovereign Integrity (PSI) Protocol, version 1.2, a cryptographic framework enabling organizations to prove compliance with AI regulations without disclosing proprietary model architectures, training data, or inference logic.</t>
    </abstract>
  </front>
  <middle>
    <section>
      <name>Introduction</name>
      <t>The proliferation of artificial intelligence systems across critical sectors has created an urgent need for verifiable compliance mechanisms. The EU AI Act mandates technical conformity assessment for high-risk AI systems. The PSI Protocol addresses these limitations through cryptographic verification primitives.</t>
    </section>
    <section>
      <name>Terminology</name>
      <t>Commit: An atomic action submitted for compliance verification.</t>
      <t>Predicate: A machine-readable regulatory requirement.</t>
      <t>PIL: Protocol Intervention Layer (runtime execution gate).</t>
    </section>
    <section>
      <name>Protocol Overview</name>
      <t>The PSI Protocol operates as a 4-stage pipeline: COMMIT, CHALLENGE, PROVE, and VERIFY.</t>
    </section>
    <section>
      <name>Cryptographic Primitives</name>
      <t>PSI uses SHA-256 for hashing, Ed25519 for digital signatures, and Groth16-compatible zero-knowledge commitments over BN128 fields.</t>
    </section>
    <section>
      <name>Deterministic Pre-Flight</name>
      <t>The PIL evaluates actions BEFORE commit, blocking HIGH or UNACCEPTABLE risk patterns.</t>
    </section>
    <section>
      <name>Sovereign Tribunal</name>
      <t>Human oversight is provided by 5 auditors with a 3/5 threshold for ratification.</t>
    </section>
    <section>
      <name>Orbital Integrity Protocol (OIP)</name>
      <t>Extends PSI to space-based compute environments, defining radiation-tolerant proof generation.</t>
    </section>
    <section>
      <name>Security Considerations</name>
      <t>Protocol mitigates log tampering, false-negatives, and single points of failure.</t>
    </section>
    <section>
      <name>IANA Considerations</name>
      <t>This document requests registration of application/psi-proof+json and the psi:// URI scheme.</t>
    </section>
  </middle>
  <back>
    <references>
      <name>References</name>
      <reference anchor="RFC8032" target="https://www.rfc-editor.org/info/rfc8032">
        <front>
          <title>Edwards-Curve Digital Signature Algorithm (EdDSA)</title>
          <author initials="S." surname="Josefsson"/>
          <author initials="I." surname="Liusvaara"/>
          <date month="January" year="2017"/>
        </front>
        <seriesInfo name="RFC" value="8032"/>
      </reference>
    </references>
  </back>
</rfc>
