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Specialized Cyber Defense & Operational Agents

Problem Statement

Zero Trust Policy Decision Points (PDPs) evaluate access requests based on context (device posture, user identity, network location, time). Static RBAC rules cannot handle multi-variable contextual evaluation, leading to overly rigid or permissive access decisions.

Goal

Deploy an agentic Policy Decision Point (PDP) that dynamically evaluates access requests against real-time contextual risk signals.

Outcome Measurement

  1. Zero Trust Enforcement: 100% block rate on untrusted device access requests to sensitive internal resources.
  2. User Experience: Seamless access approval for authenticated, low-risk requests.

How the Code was Built

Evaluates multi-factor risk state inside a structured decision matrix.

Executable Code

from pydantic import BaseModel, Field
from langchain_openai import ChatOpenAI
class ZeroTrustPolicyDecision(BaseModel):
access_granted: bool
trust_score: float
enforced_mitigations: list[str] = Field(description="MFA_REAUTHENTICATE, STEP_UP_AUTH, STEP_DOWN_PRIVILEGES, DENY")
reasoning: str
def evaluate_zero_trust_access(user_role: str, device_is_managed: bool, disk_encrypted: bool, access_location: str, resource_sensitivity: str) -> ZeroTrustPolicyDecision:
llm = ChatOpenAI(model="gpt-4o", temperature=0)
structured_llm = llm.with_structured_output(ZeroTrustPolicyDecision)
prompt = f"""
Evaluate Zero Trust Access Request:
User Role: {user_role}
Managed Device: {device_is_managed}
Disk Encrypted: {disk_encrypted}
Location: {access_location}
Target Resource: {resource_sensitivity}
"""
return structured_llm.invoke(prompt)
if __name__ == "__main__":
res = evaluate_zero_trust_access(
user_role="Database Administrator",
device_is_managed=False,
disk_encrypted=False,
access_location="Public Coffee Shop Wi-Fi",
resource_sensitivity="Production Customer PII Database"
)
print(f"Access Granted: {res.access_granted}")
print(f"Trust Score: {res.trust_score}")
print(f"Enforced Actions: {res.enforced_mitigations}")
print(f"Reasoning: {res.reasoning}")

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