# Takumi Blackbox Assessment Engine Improvements

We've made some improvements to the Takumi Blackbox Assessment engine.

## Overview

Since the release of Blackbox Assessment in November 2025, we've been continuously working on improving the engine. This update brings three major enhancements: improved precision rate through a new verification layer, optimized scan efficiency, and support for multiple in-scope/out-of-scope URLs.

## Improved Precision Rate

We've added a new verification layer that filters out false positives for certain vulnerability types. This enables Takumi to report vulnerabilities more accurately by avoiding non-exploitable issues.

In the assessment report, findings verified by this layer are labeled "Validated", while others are labeled "Requires Verification" to help you triage results.

![Verification badge in assessment report](/docs/_md-assets/30ae5c3aca-badge_en.png)

The benchmark report published in early December 2025 uses this verification layer:

- [Takumi (Blackbox) Benchmark Report (English)](<https://hs.flatt.tech/hubfs/Takumi%20Benchmark%20Report/Takumi%20(Blackbox)%20Benchmark%20Report-en.pdf>)

## Enhanced Scope Configuration

Blackbox Assessment now supports **multiple in-scope and out-of-scope URLs**, giving you more granular control over what gets tested.

This is particularly useful for:

- Applications spanning multiple subdomains
- Testing specific sections while excluding others

![Multiple URL configuration](/docs/_md-assets/582ab50879-multi_urls_en.png)

## Performance Optimizations

We've made several internal optimizations to improve scan efficiency:

- **Proper scan scope enforcement**: Improved adherence to designated feature scope and vulnerability perspectives
- **Enhanced crawl coverage**: Fixed an issue where certain types of endpoints were not being discovered during crawling

These optimizations improved precision while maintaining recall. We also observed 30-50% improvement in both scan time and credit consumption. We use the same methodology as described in the [Takumi (Blackbox) Benchmark Report](<https://hs.flatt.tech/hubfs/Takumi%20Benchmark%20Report/Takumi%20(Blackbox)%20Benchmark%20Report-en.pdf>).

## Availability

This feature is available to all Takumi by GMO users at no additional cost.