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Security report for d-k.io

DK · Media · France

Medium risk. 7 critical or high findings in Security headers and GDPR outside view.

Security score

67/100

Risk levelMedium

0–100, higher is better. How it is calculated

DK is a French company specializing in carbon measurement and management solutions tailored for the communication, media, and advertising sectors. Their platform offers harmonized and standardized carbon footprint measurement tools, including an API for automated calculations, targeting advertisers, agencies, publishers, and media companies. The company positions itself as a market reference in France with notable media clients and a strong emphasis on sustainability and environmental impact reduction. Technically, the website is well-built with modern technologies such as Matomo analytics and Google Tag Manager, hosted by OVH SAS. It demonstrates excellent mobile optimization, accessibility, and SEO practices. However, it lacks explicit privacy and cookie policies, which are important for GDPR compliance. Security posture is good with HTTPS enforced and no visible vulnerabilities, but the absence of security headers and incident response information are areas for improvement. Overall, the website is professional, trustworthy, and content-rich, reflecting a credible business with a clear mission. The domain registration data aligns well with the business claims, enhancing legitimacy. Privacy compliance and security transparency could be strengthened to improve user trust and regulatory adherence.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

7 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

Need hands-on remediation? Email guard@offseq.com

Keep watching d-k.io

This scan found 22 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
95
Security headers
15
Email security
75
DNS health
80
Network security
100
GDPR outside view
35
Average
67

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

DK operates in the niche market of carbon footprint measurement for media and advertising, leveraging official standards and data sources such as ADEME and the Association Bilan Carbone. Their SaaS platform and API enable clients to measure, analyze, and reduce carbon emissions from campaigns across multiple channels. The company targets a specialized audience including top media groups and agencies, indicating a focused B2B business model. The presence of case studies and client logos suggests active market engagement and growing adoption. The company is relatively young (founded 2021) but shows signs of maturity and strategic positioning in the sustainability tech space. Partnerships with eco-design agencies like Haploïde and use of recognized standards reinforce their market credibility. Revenue likely derives from subscription or usage fees for their platform and API services. The company’s growth potential is tied to increasing regulatory and corporate focus on environmental impact in advertising.

Security posture

The website enforces HTTPS and uses privacy-conscious analytics (Matomo with Do Not Track and disabled cookies). No sensitive data or vulnerable libraries were detected in the HTML content. However, the absence of security headers such as Content-Security-Policy, X-Frame-Options, and X-Content-Type-Options reduces defense-in-depth. There is no visible security policy or incident response contact, which limits transparency and preparedness for security incidents. No vulnerability disclosure or security.txt file is present, which is a best practice for responsible disclosure. Overall, the security posture is good but could be improved by implementing standard security headers, publishing security policies, and providing clear incident response channels. These steps would enhance trust and compliance with security frameworks.

Recommendations

  1. Implement and publish a comprehensive privacy policy and cookie consent mechanism to improve GDPR compliance.
  2. Add standard security headers (Content-Security-Policy, X-Frame-Options, X-Content-Type-Options) to enhance protection against common web attacks.
  3. Publish a security policy and incident response contact information to improve transparency and readiness.
  4. Consider creating a vulnerability disclosure policy or security.txt file to facilitate responsible security reporting.
  5. Enhance contact information by adding verified company phone numbers for better user support and trust.

Contact details published on the site

Addresses
Legal name
Diploïde SAS
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
DK
Description
DK est la seule plateforme qui offre une mesure carbone harmonisée et standardisée pour la communication, les medias et la publicité. Leur mission est d'aider à réduire et piloter les émissions de gaz à effet de serre générées par les communications publicitaires.
Key services
Mesure carbone cross-channels, API de calcul carbone, Rapports d'audit carbone exportables, Recommandations d'actions pour réduction d'impact
Content quality
excellent
Branding
consistent

Technology

Stack
Matomo Analytics, Google Tag Manager, JavaScript, CSS, HTML5
Performance
fast
Mobile
excellent
Accessibility
excellent
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • No vulnerable libraries detected
  • No forms with sensitive inputs detected

Analytics and tracking

Services
Matomo, Google Analytics (via GTM)
Tracking level
minimal
Privacy practices
basic

Advertising

Tracking pixels
Matomo
Transparency
basic

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with rich content and no blocking.
  2. Strong focus on carbon measurement for media and advertising sectors.
  3. No explicit privacy or cookie policies found, which is a compliance gap.
  4. No visible contact phone numbers; only email and physical address provided.
  5. Use of Matomo analytics with Do Not Track enabled and cookies disabled indicates privacy-conscious tracking.
  6. No security.txt or vulnerability disclosure policy found.
  7. Good branding consistency and professional design.
  8. No suspicious or malicious content detected.
Technical notes

Notes

The website uses modern web technologies including HTML5, CSS, JavaScript, Matomo analytics, and Google Tag Manager. It is hosted by OVH SAS, a reputable French hosting provider. The site demonstrates excellent mobile responsiveness, accessibility compliance (RGAA v4), and SEO optimization with proper meta tags and structured data (JSON-LD). Performance is fast with optimized images and minimal page weight (~9.37 KB reported by DK badge). No CMS is explicitly detected, suggesting a custom or static site build. The site integrates an API for carbon calculation and uses client-side scripts for analytics and UI interactions. Technical debt appears low, but adding security headers and formal privacy mechanisms would improve the technical maturity and compliance posture.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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