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Security report for threesigma.xyz

Three Sigma · Technology · N/a

Medium risk. 4 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

69/100

Risk levelMedium

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

Three Sigma is a specialized blockchain security and DeFi audit service provider focused on securing Web3 projects through comprehensive smart contract and economic audits. The company positions itself as a full-spectrum security partner for crypto projects, boasting over 100 audits completed and billions in client assets protected. Their target audience includes blockchain developers, DeFi protocols, and Web3 projects seeking to enhance security and economic sustainability. The website demonstrates a high level of professionalism, with detailed service offerings and client testimonials that reinforce their market credibility. Technically, the website is built on modern frameworks such as Next.js and React, hosted on Vercel, and integrates multiple analytics and tracking tools including Vercel Analytics, Microsoft Clarity, Hotjar, and Google Analytics. The site is well-optimized for performance, mobile responsiveness, and SEO, reflecting a mature digital infrastructure. Security best practices are observed with HTTPS enforcement and appropriate security headers, although explicit security policies and incident response information are not publicly detailed. From a security posture perspective, the site shows strong HTTPS and header configurations, no exposed sensitive data, and no visible vulnerabilities in third-party libraries. However, the absence of privacy and cookie policies, as well as lack of explicit contact information for security incidents, represents areas for improvement. The WHOIS data aligns well with the business claims, showing consistent registration details and domain age appropriate for the company's experience. Overall, the website is trustworthy and professional, with a strong technical foundation and clear business focus. Strategic recommendations include publishing comprehensive privacy and cookie policies, establishing a vulnerability disclosure program, and providing clear incident response contacts to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
68/ 100 · Medium
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

4 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 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 Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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

Keep watching threesigma.xyz

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.

Daily monitoring

Recommended

€25per month

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

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
75
Security headers
30
Email security
70
DNS health
70
Network security
100
GDPR outside view
68
Average
69

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

Three Sigma operates in the blockchain security and DeFi audit sector, targeting Web3 projects that require robust security and economic analysis. Their competitive advantage lies in offering both code audits and economic modeling services, addressing a broad spectrum of security needs in the crypto space. The business model is service-oriented, generating revenue through audits and consulting engagements. The presence of high-profile clients and detailed case studies suggests a growing market presence and a strong partnership ecosystem. The company emphasizes quality and professionalism, which is reflected in their website content and client testimonials. Growth indicators include a portfolio of over 100 audits and billions in secured assets, positioning them as a trusted security partner in the blockchain industry.

Security posture

The website demonstrates a mature security posture with HTTPS enabled and multiple security headers implemented, reducing common web vulnerabilities. There is no evidence of exposed sensitive data or use of vulnerable libraries. However, the lack of published security policies, incident response procedures, and vulnerability disclosure mechanisms indicates gaps in transparency and readiness for security incidents. Compliance with GDPR and other privacy regulations is not clearly addressed, and no cookie consent mechanism is present. The use of multiple tracking and analytics tools suggests moderate user tracking, which should be balanced with privacy compliance. Overall, the security maturity is good but can be enhanced by formalizing policies and improving user privacy controls.

Recommendations

  1. Publish a comprehensive privacy policy detailing data collection, usage, and GDPR compliance.
  2. Implement a cookie policy and consent mechanism to comply with privacy regulations.
  3. Establish and publicize a vulnerability disclosure program and security.txt file.
  4. Provide clear contact information for security incidents and abuse reporting.
  5. Regularly review and audit third-party scripts and tracking tools for privacy and security compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Three Sigma
Description
Secure and scale your Web3 projects with Three Sigma. We deliver high-quality blockchain security and DeFi audits, ensuring your projects' success!
Key services
Smart Contract Audit, Solidity Audit, Rust Smart Contract Audit, Move Audits, dApp Audit, Blockchain Bridge Audit, Economic Audit, Tokenomics Audit, Ecosystem Risk Assessment, Points & Incentives Program Design
Content quality
excellent
Branding
consistent

Technology

Stack
React, Next.js, Vercel Analytics, Vercel Speed Insights, Hotjar, Microsoft Clarity, Twitter Universal Website Tag, Bing Ads
Frameworks
Next.js, React
Platforms
Vercel
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • No exposed sensitive data in HTML
  • Use of modern JavaScript frameworks
  • No visible vulnerable libraries

Analytics and tracking

Services
Vercel Analytics, Microsoft Clarity, Hotjar, Google Analytics (via GTM)
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Bing Ads, Twitter Ads
Tracking pixels
Microsoft Clarity, Hotjar, Google Analytics (via GTM)
Marketing tools
Termly (cookie consent and policy management)
Transparency
good

Site quality

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

Key observations

  1. Website is professionally designed with clear branding and consistent messaging.
  2. No explicit privacy, cookie, or terms of service policies found on the main page.
  3. Multiple client testimonials and logos indicate established market presence.
  4. Use of modern web technologies and analytics tools.
  5. No direct contact emails or phone numbers visible on the homepage content.
  6. No visible forms collecting personal data on the homepage.
  7. Strong HTTPS and security headers implemented.
  8. No signs of suspicious or malicious content.
Technical notes

Notes

The website is built using modern web technologies including React and Next.js, hosted on Vercel, which supports fast loading times and scalability. The integration of analytics and user behavior tracking tools like Hotjar and Microsoft Clarity indicates a focus on user experience optimization. The site is mobile-optimized and accessible, with good SEO practices evident in meta tags and structured content. There is no indication of technical debt or outdated components. Opportunities for modernization include adding structured security and privacy documentation and enhancing compliance features. Technical risks are minimal but should be monitored with respect to third-party script usage and privacy regulations.
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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