Introducing OPI: The Open Protection Index for DDoS Resilience

The Problem: No Standard for DDoS Resilience

When a CISO asks "How resilient are we to DDoS attacks?", the answer is usually vague at best. Security teams might say "We have Cloudflare" or "Our WAF is configured" but these aren't quantifiable measures of actual resilience.

Unlike penetration testing (which has CVSS scores) or compliance (which has SOC 2, ISO 27001), DDoS resilience has lacked an objective, standardized measurement system. Until now.

What is OPI?

The Open Protection Index (OPI) is a comprehensive scoring system (0-100) that measures an organization's resilience to DDoS attacks across six key dimensions: defense coverage, L7 resilience, L3/L4 resilience, protocol resilience, operational resilience, and evasion resistance.

The OPI Score: 0-100

OPI provides a single, easy-to-understand score from 0-100, with letter grades that executives and technical teams can immediately grasp:

Grade B - Good

Example OPI Score

A 90-100 Excellent

B 80-89 Good

C 70-79 Adequate

D 60-69 Poor

F <60 Critical

Six Components of Resilience

OPI doesn't just give you a number - it breaks down resilience into six measurable components, each weighted by importance:

Defense Coverage 20%

CDN, WAF, origin protection, rate limiting

L7 Attack Resilience 25%

HTTP floods, Slowloris, cache bypass, API abuse

L3/L4 Resilience 15%

SYN floods, UDP amplification, network layer

Protocol Resilience 15%

HTTP/2 Rapid Reset, QUIC, protocol vulnerabilities

Operational Resilience 15%

Availability, latency, recovery time, false positives

Evasion Resistance 10%

JA3 rotation, behavioral detection, slow rate

The OPI Formula

OPI is calculated using a weighted sum of the six components:

                // OPI Total Score Calculation
OPI_Total = (
    Defense_Coverage      x 0.20  +
    L7_Attack_Resilience  x 0.25  +
    L3_L4_Resilience      x 0.15  +
    Protocol_Resilience   x 0.15  +
    Operational_Resilience x 0.15  +
    Evasion_Resistance    x 0.10
)

// Normalized by attack intensity
OPI_Normalized = OPI_Total x (1 + intensity_factor x 0.1)
            

Why OPI Matters

For CISOs and Security Leaders

Board-ready metric: Explain security posture in one number
Benchmark against peers: Compare your OPI to industry averages
Track improvement: Measure progress over time
Justify investments: Show ROI with before/after OPI scores

For Security Engineers

Identify weaknesses: Component breakdown shows exactly where to improve
Prioritize work: Fix highest-impact issues first
Validate changes: Re-test after configuration updates
Reproducible results: Same methodology every time

For Compliance

Evidence for audits: Documented resilience testing
Third-party validation: Open standard, not proprietary
Continuous compliance: Regular OPI assessments

How OPI Testing Works

OPI assessments follow a structured methodology:

Baseline Measurement: Measure latency and availability before any testing
Defense Discovery: Identify CDN, WAF, and protection layers in place
Attack Simulation: Controlled tests against each resilience category
External Validation: Verify availability from multiple global locations
Score Calculation: Compute OPI from test results
Report Generation: Detailed breakdown with recommendations

External Validation is Key

OPI uses validators from 200+ global locations (Cloudflare Workers, AWS Lambda, Globalping) to verify that legitimate traffic isn't being blocked during tests. This is how we detect false positives.

OPI is Open

Unlike proprietary security scoring systems, OPI is designed to be an open standard:

Open Specification: Full methodology published under Apache 2.0
Reproducible: Any organization can implement OPI testing
Peer-Reviewed: Community feedback and RFC process
No Vendor Lock-in: Works with any CDN/WAF combination

Display Your OPI Score

Organizations can display their OPI score with badges:

Badges can be embedded on your website, security page, or status dashboard to demonstrate your commitment to DDoS resilience.

Get Your OPI Score

Discover your organization's DDoS resilience score with a comprehensive OPI assessment.

Learn More About OPI Get Started

What's Next for OPI

OPI v1.0 is just the beginning. We're working on:

Industry Benchmarks: Average OPI scores by industry vertical
Continuous Monitoring: Real-time OPI tracking over time
API Integration: Embed OPI testing in CI/CD pipelines
Peer Review Board: Formal RFC process for specification updates

The goal is simple: make DDoS resilience as measurable as any other security metric. With OPI, the question "How resilient are we?" finally has a quantifiable answer.

Introducing OPI: The Open Protection Index