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Security report for zkcloud.com

ZkCloud · Technology · Finland

Medium risk. 4 critical or high findings in Security headers and SSL/TLS.

Security score

71/100

Risk levelMedium

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

ZkCloud is a Finnish technology company specializing in decentralized zero-knowledge proof cloud computing services. They provide fast, cost-effective, and scalable infrastructure for blockchain scalability and privacy, targeting developers and businesses requiring universal proving infrastructure for zero-knowledge proofs. The company positions itself as a niche provider in the blockchain and cryptography technology sector with a focus on decentralized cloud solutions. Technically, the website is built on modern frameworks such as Next.js and React, hosted likely via Cloudflare, and integrates analytics and cookie consent tools like Google Tag Manager, TikTok Analytics, and Cookiebot. The site is well-structured, mobile-optimized, and uses HTTPS with domain locking status codes, though DNSSEC is not enabled. Security posture is good but could be improved with explicit security policies and vulnerability disclosures. Privacy compliance is basic, with a cookie consent mechanism but no dedicated privacy policy page found. Overall, the website is professional and trustworthy, with clear contact information and consistent domain registration data. Strategic recommendations include enabling DNSSEC, publishing privacy and security policies, and adding vulnerability disclosure mechanisms to enhance trust and compliance.

Scanned

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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 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. 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 zkcloud.com

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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
75
Security headers
20
Email security
70
DNS health
75
Network security
100
GDPR outside view
83
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 zkcloud.com, from OffSeq Breach.

No leaked records found

Breach holds no records for zkcloud.com 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

ZkCloud operates in the technology sector, focusing on blockchain scalability and privacy through zero-knowledge proof infrastructure. Their business model is service-oriented, providing decentralized cloud computing resources on demand. The company targets developers and enterprises in blockchain and cryptography fields, leveraging partnerships and community channels such as Telegram, Discord, and Twitter. The domain age and registrant information support a credible and established presence since 2011. The company emphasizes transparency with contact details and uses industry-standard cookie consent tools. Growth indicators include active user statistics and partner mentions on the site. The ecosystem and documentation links suggest an engaged developer community and ongoing product development.

Security posture

The website demonstrates a mature security posture with HTTPS enforced and domain status codes preventing unauthorized changes. However, DNSSEC is not enabled, which is a recommended best practice for domain security. No explicit security policy or incident response contact is published, which limits transparency in handling security incidents. The site uses cookie consent management compliant with GDPR principles but lacks a dedicated privacy policy page. No vulnerability disclosure or security.txt file is found, which could improve security culture and incident response readiness. Overall, the security posture is good but can be enhanced by addressing these gaps to meet higher compliance and trust standards.

Recommendations

  1. Enable DNSSEC to strengthen domain name system security.
  2. Publish a comprehensive privacy policy page detailing data processing and user rights.
  3. Create and publish a security policy and incident response contact information.
  4. Implement a vulnerability disclosure program or security.txt file to encourage responsible reporting.
  5. Regularly review and update cookie consent and tracking practices to maintain GDPR compliance.

Contact details published on the site

Addresses
Legal name
ZkCloud
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
ZkCloud
Description
ZkCloud offers fast, cheap, and decentralized zero-knowledge proof solutions for blockchain scalability and privacy. They empower developers and businesses with the first universal proving infrastructure for zero-knowledge proofs.
Key services
Decentralized zero-knowledge proof solutions, Universal proving infrastructure, On-demand compute for any prover and proof system
Content quality
good
Branding
consistent

Technology

Stack
Next.js, React, Cloudflare DNS, Google Tag Manager, Cookiebot, TikTok Analytics
Frameworks
Next.js
Platforms
Cloudflare
Performance
moderate
Mobile
good
Accessibility
good
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Domain locked with multiple EPP status codes
  • Cookie consent implemented

Analytics and tracking

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

Advertising

Tracking pixels
TikTok Analytics
Marketing tools
Cookiebot
Transparency
basic

Site quality

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

Key observations

  1. Website uses modern web technologies and frameworks
  2. Cookie consent is implemented with detailed cookie categories
  3. No explicit privacy policy or terms of service pages found
  4. Contact information is provided via JSON-LD structured data
  5. No security.txt or vulnerability disclosure found
  6. DNSSEC not enabled, which is a minor security gap
  7. Website content is focused on zero-knowledge proof cloud services
  8. No WAF or blocking mechanisms detected
Technical notes

Notes

The website is built using modern web technologies including Next.js and React, indicating a contemporary and maintainable codebase. Hosting and DNS services are provided by Cloudflare, offering performance and security benefits. The site integrates third-party analytics and marketing tools such as Google Tag Manager and TikTok Analytics, managed through Cookiebot for consent compliance. Performance is moderate with good mobile optimization and accessibility features. SEO is supported by proper meta tags and structured data in JSON-LD format. The absence of a CMS suggests a custom or framework-based solution. Technical risks include the lack of DNSSEC and missing explicit security and privacy documentation, which could impact compliance and trust. Overall, the technical infrastructure is solid with room for improvement in security and privacy documentation.
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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