Is crossref.cz Safe? Security Analysis for Solen Software, s.r.o.
https://crossref.czCheck if crossref.cz is a scam or legitimate. Free security scan and reviews.
Below Education avg (55)
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
The website crossref.cz serves as an educational and informational portal focused on the CrossRef system, DOI identifiers, and scientific databases, primarily targeting the Czech academic and research community. It provides clear explanations about CrossRef as a reference linking system and DOI as a persistent digital identifier, linking to official CrossRef and DOI websites. The site is operated by Solen Software, s.r.o., a Czech company, and uses a Czech hosting provider, reflecting a consistent regional focus. From a technical perspective, the site employs legacy JavaScript libraries such as jQuery 1.7.2 alongside modern analytics tools like Google Analytics and Google Tag Manager. The content is well-structured with professional design and navigation, though mobile optimization and accessibility are basic. The site uses the Actavia editorial system and is hosted on Aerohosting servers. Performance is moderate, with no critical technical issues detected. Security posture is moderate but could be improved. The site lacks HTTPS confirmation in the provided data, no explicit security headers were detected, and no privacy or cookie policies are present, indicating gaps in compliance with GDPR and modern security best practices. No forms or sensitive data collection points reduce immediate risk, but the absence of contact and incident response information limits transparency. Overall, the website is a legitimate, niche educational resource with consistent WHOIS data and a stable domain age. However, it would benefit from enhanced privacy compliance, security hardening, and clearer contact information to improve trust and regulatory adherence.
Detected Technologies
12 urgent findings need attention
1 critical · 11 high
- + 4 more findings in the full report below
Keep crossref.cz under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
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Security Headers
3 findings
70/100
GDPR Compliance
5 findings
10/100
NIS2 Compliance
9 findings
2/100
Email Security
4 findings
70/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
Crossref.cz operates as a specialized educational platform providing information about DOI and CrossRef systems, targeting researchers, academic publishers, and librarians primarily in the Czech Republic. Its competitive advantage lies in localized content and clear linkage to official DOI and CrossRef resources. The business model appears informational rather than transactional, supporting academic referencing and publishing workflows. Revenue streams are not explicit but may derive from software services by Solen Software or partnerships. The partnership ecosystem includes Actavia (editorial system) and Solen Software (developer and copyright holder). Growth indicators are limited due to niche focus, but the site maintains a stable presence since 2012. Strategic observations suggest opportunities to expand compliance transparency and enhance user engagement through contact and policy disclosures.
Security Posture Analysis
Comprehensive Security Assessment
The website demonstrates a basic security maturity level with no visible critical vulnerabilities or exposed sensitive data. However, the absence of HTTPS confirmation, security headers, and privacy/cookie policies indicates compliance and security gaps. The lack of incident response contact channels and vulnerability disclosure mechanisms reduces readiness for security events. Use of older JavaScript libraries may pose potential risks if not regularly updated. The site does not collect user data via forms, minimizing attack surface. Overall, security practices are minimal and should be enhanced to meet GDPR and modern web security standards.
Strategic Recommendations
Priority Actions for Security Improvement
Implement HTTPS with a valid SSL/TLS certificate and enforce secure connections site-wide.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
Solen Software, s.r.o.
Website dedicated to the CrossRef system, DOI identifiers, and scientific databases. It provides information about CrossRef as an independent reference system linking citations and electronic journal articles, and about DOI as a unique and permanent international identifier for digital objects such as online publications.
good
consistent
Technical Stack
moderate
basic
basic
basic
Security Assessment
- No forms detected to collect sensitive data
- No exposed credentials or sensitive data in HTML
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is an informational resource about CrossRef and DOI in Czech language.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing Content-Security-Policy header
HIGHControls resources the browser is allowed to load
Missing Referrer-Policy header
LOWControls referrer information sent with requests
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Privacy Policy found
HIGHGDPR requires a clear and accessible privacy policy
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
EU business without adequate privacy measures
CRITICALEU businesses are subject to strict GDPR requirements
Third-party services without privacy policy
HIGHDetected services: Google Analytics, Google APIs
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
Critical sector without clear security compliance
HIGHDetected sectors: digital
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
SPF Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 83 days
Mixed Content Detected
MEDIUM7 resources loaded over insecure HTTP
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
No DMARC Record
MEDIUMDMARC policy not configured
Domain Registration Details
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Service Exposed: SSH
MEDIUMPort 22 (SSH) is publicly accessible - SSH - Secure but can be brute-forced
How does crossref.cz compare?
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🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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PDF Report & Export
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Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.
SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
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