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Security report for sherlock.xyz

Private by Design, LLC · Technology · United States

Medium risk. 5 critical or high findings in GDPR outside view and SSL/TLS.

Security score

71/100

Risk levelMedium

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

Sherlock is a leading blockchain security company founded in 2020 and operated by Private by Design, LLC in the US. It offers a comprehensive suite of security solutions including private security services via Blackthorn, collaborative audits, audit contests, bug bounty programs, and insurance coverage through Sherlock Shield. The company is trusted by top Web3 protocols and has a strong reputation for finding critical vulnerabilities and securing over $100 billion in TVL. Technically, the website is built on modern web technologies such as Webflow CMS, GSAP animations, and Swiper.js, hosted with Cloudflare DNS. The site is well-optimized for performance, mobile, and SEO, with good accessibility features. Security posture is strong with HTTPS and domain transfer protections, though DNSSEC is not enabled and security headers are not explicitly detected. Privacy compliance is limited due to absence of privacy and cookie policies. Overall, Sherlock demonstrates high business credibility and technical maturity with room for improvement in privacy and security transparency.

Scanned

This is an earlier scan of sherlock.xyz. View the latest report

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

5 findings rated critical or high. Fix these first.

  1. 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

    • 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

    • High

      Third-party services without privacy policy

      Detected services: Google Analytics, Twitter, LinkedIn, Google APIs

      What to do: Document all third-party data sharing in your privacy policy

  2. 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 sherlock.xyz

This scan found 20 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

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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
75
Security headers
60
Email security
75
DNS health
80
Network security
100
GDPR outside view
35
Average
71

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 sherlock.xyz, from OffSeq Breach.

No leaked records found

Breach holds no records for sherlock.xyz 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

Sherlock holds a dominant market position in blockchain security, leveraging a unique business model that combines crowdsourced audit contests and private security services. Its revenue streams likely include audit fees, bug bounty management, and insurance coverage premiums. The target customers are blockchain protocols and Web3 companies seeking advanced security solutions. The company has built a robust partnership ecosystem including its subsidiary Blackthorn and maintains active engagement with the security researcher community. Growth indicators include extensive client testimonials, large bounty payouts, and a growing number of completed audit contests. Strategic observations highlight Sherlock's emphasis on transparency, quality, and community-driven security.

Security posture

Sherlock exhibits a mature security posture with enforced HTTPS, domain transfer and deletion protections, and a strong reputation for vulnerability detection. However, the lack of DNSSEC and missing security headers such as Content-Security-Policy and X-Frame-Options represent areas for enhancement. No direct security or incident response contact emails are published, which could hinder rapid incident communication. Privacy policies and cookie consent mechanisms are absent, indicating compliance gaps with GDPR and related regulations. The company should consider publishing a security policy and incident response procedures to improve trust and readiness. Overall, the security culture appears strong but could benefit from increased transparency and formalized policies.

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. Add explicit security headers (CSP, X-Frame-Options, HSTS) to improve web security posture.
  4. Provide dedicated security incident response contact information publicly.
  5. Implement a cookie consent mechanism to comply with privacy regulations.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Private by Design, LLC
Description
Sherlock is the global leader in blockchain security, providing custom security solutions powered by top security researchers and trusted by leading Web3 protocols.
Key services
Blackthorn private security firm, Collaborative Audits, Audit Contests, Bug Bounties, Sherlock Shield coverage
Content quality
excellent
Branding
consistent

Technology

Stack
Webflow CMS, GSAP animation library, Swiper.js slider, Google Fonts (Inter), Google Tag Manager, Analyzely analytics, Fubi annotation tool
Frameworks
Webflow
Platforms
Cloudflare DNS
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited and clientDeleteProhibited domain status
  • No DNSSEC enabled (recommend enabling)

Analytics and tracking

Services
Google Analytics (via GTM), Analyzely
Tracking level
moderate
Privacy practices
basic

Advertising

Tracking pixels
Analyzely
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 and well-structured.
  2. Strong focus on blockchain security services with multiple product offerings.
  3. Active engagement with community via audit contests and bug bounties.
  4. No explicit privacy or cookie policies found, which is a compliance gap.
  5. No direct security or incident response contact emails published.
  6. Use of modern web technologies and analytics tools.
  7. WHOIS data supports business legitimacy and transparency.
Technical notes

Notes

The website leverages a modern and performant technology stack including Webflow CMS, GSAP for animations, and Swiper.js for interactive sliders. Hosting and DNS are managed via Cloudflare, ensuring reliable uptime and fast content delivery. The site is mobile-optimized with responsive design and good accessibility features. SEO is supported by proper meta tags and Open Graph data. No major technical debt or deprecated libraries were detected. The use of analytics tools like Google Tag Manager and Analyzely indicates a mature approach to user behavior tracking and marketing. Opportunities exist to improve security headers and privacy compliance to reduce risk and enhance user trust.
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

Earlier scans of this domain

  1. 71/100Medium27 findingsView report
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