Skip to main content

Security report for scf.so

Fuzzland Inc. · Technology · N/a

Medium risk. 10 critical or high findings in Email security, Security headers and 2 other checks.

Security score

57/100

Risk levelMedium

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

The website scf.so is a personal professional portfolio site for Chaofan Shou, a software engineer specializing in blockchain security, fuzzing, and smart contract auditing. The site highlights his career achievements, including co-founding Fuzzland, a Web3 security and HFT company acquired by Solayer, his extensive bug bounty contributions, and academic publications. The target audience includes blockchain security professionals, researchers, and potential collaborators. The business model centers on personal branding, showcasing expertise, and promoting hiring opportunities at Fuzzland. Technically, the site uses modern JavaScript with Amplitude analytics, Google Fonts, and is hosted behind Cloudflare DNS. The site is moderately optimized for performance and mobile devices, with basic accessibility and SEO features. However, it lacks explicit privacy and cookie policies, and security headers are not detected, indicating room for improvement in security best practices. From a security perspective, the site enforces HTTPS and has domain transfer protections but lacks DNSSEC and security.txt for incident response. No vulnerabilities or exposed sensitive data were detected. The absence of privacy and cookie policies and consent mechanisms presents compliance gaps, especially regarding GDPR. Overall, the site is trustworthy and professional but could enhance its security and privacy posture. The overall risk is low given the nature of the site as a personal professional portfolio. Strategic recommendations include adding privacy and cookie policies, enabling DNSSEC, implementing security headers, and publishing a vulnerability disclosure policy to improve compliance and trust.

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

10 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. 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';…

  3. 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

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

Keep watching scf.so

This scan found 26 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
95
Security headers
15
Email security
40
DNS health
55
Network security
100
GDPR outside view
35
Average
57

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention scf.so, from OffSeq Breach.

No leaked records found

Breach holds no records for scf.so right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.

Monitor on Breach (opens in a new tab)

Technical appendix

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

Business context

Business profile

Chaofan Shou operates in the blockchain security technology sector with a strong focus on fuzzing and smart contract auditing. The business is positioned as a niche expert entity with significant bug bounty achievements and academic contributions, enhancing credibility. Revenue streams likely include consulting, security services, and equity in blockchain projects. The partnership ecosystem includes Fuzzland and Solayer, indicating strategic acquisitions and collaborations. The site reflects a growth-oriented professional with a strong technical background and active community engagement through publications and talks.

Security posture

The website demonstrates a moderate security maturity level with HTTPS enforced and domain transfer protections. However, the lack of DNSSEC, security headers, privacy policies, and vulnerability disclosure mechanisms indicates gaps in comprehensive security and compliance practices. No critical vulnerabilities or exposed sensitive data were found. The use of third-party analytics without consent mechanisms is a privacy concern. Incident response readiness is limited due to missing security.txt or dedicated security contacts. Overall, the security culture appears professional but could benefit from formalized policies and technical enhancements.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish comprehensive privacy and cookie policies with GDPR compliance details.
  3. Implement standard security headers such as Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options.
  4. Add a security.txt file to provide clear incident response contact information.
  5. Introduce a vulnerability disclosure policy to encourage responsible reporting and improve trust.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Fuzzland Inc.
Description
Personal professional website of Chaofan Shou, a software engineer specializing in blockchain security, fuzzing, and smart contract auditing. He is CTO and co-founder of Fuzzland, a Web3 security and HFT company, now acquired by Solayer. The site highlights his career, publications, talks, bug bounty achievements, portfolio investments, and contact information.
Key services
Blockchain security research, Smart contract auditing, Bug bounty contributions, High-frequency trading security
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Amplitude Analytics, Google Fonts, Cloudflare DNS
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced (implied by domain and Cloudflare usage)
  • Domain status clientTransferProhibited

Analytics and tracking

Services
Amplitude
Tracking level
moderate
Privacy practices
poor

Advertising

Tracking pixels
Amplitude
Marketing tools
Amplitude Analytics
Transparency
basic

Site quality

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

Key observations

  1. Website is a personal professional portfolio and biography site for Chaofan Shou.
  2. No privacy, cookie, or terms of service policies found.
  3. No contact phone numbers or physical addresses provided.
  4. Extensive professional background and bug bounty disclosures increase trust.
  5. Use of Amplitude analytics without cookie consent or privacy policy is a compliance gap.
  6. No security.txt or vulnerability disclosure policy present.
  7. Domain registration is consistent and transparent.
  8. No signs of WAF or content blocking.
  9. No adult or questionable content detected.
Technical notes

Notes

The website uses a lightweight, custom HTML/CSS design with JavaScript for analytics via Amplitude. Hosting is through Cloudflare DNS, providing reliable and secure infrastructure. Performance is moderate with good mobile optimization. The site lacks a CMS and uses no major frameworks, indicating low technical debt but limited scalability. SEO and accessibility are basic but functional. Technical risks include missing security headers and lack of DNSSEC, which could be addressed to improve resilience. Overall, the technical implementation is solid for a personal portfolio but could be modernized with enhanced security and compliance features.
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

Reviews of this site

Share your experience with scf.so. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review scf.so.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.