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Is kleppmann.com a Scam? Security Check Results - Martin Kleppmann

kleppmann.com Security Report Summary

kleppmann.com received a security score of 58 out of 100 in Guard's comprehensive security analysis, classified as "Elevated Risk". This report covers Martin Kleppmann's website security posture. Martin Kleppmann operates in the Education industry in United Kingdom.

Dr. Martin Kleppmann's website serves as a comprehensive academic and professional platform showcasing his work as an Associate Professor at the University of Cambridge. The site highlights his research focus on local-first collaboration software and distributed systems security, his teaching activities, open source contributions, and a well-regarded book on data-intensive applications. The website targets academics, researchers, students, and professionals interested in distributed systems and cryptography. It also supports his research through Patreon and promotes his publications and conference talks. Technically, the website is built using Jekyll, with a clean and professional design that is mobile-optimized and accessible. It uses standard web technologies including HTML5, CSS3, JavaScript, and MathJax for mathematical rendering. The site performs well with fast loading times and clear navigation. However, it lacks some modern security headers and explicit HTTPS enforcement details are not available from the provided data. From a security perspective, the site does not expose sensitive data or use vulnerable libraries. There are no forms collecting sensitive user data, which reduces attack surface. However, the absence of privacy and cookie policies, security incident response information, and vulnerability disclosure mechanisms indicates gaps in compliance and security transparency. The WHOIS data for the domain is missing, which is unusual and reduces trustworthiness, though the professional nature of the content suggests legitimacy. Overall, the website is a high-quality academic resource with excellent content and user experience but could improve in privacy compliance and security transparency. The missing WHOIS data is a concern that should be investigated further to confirm domain legitimacy.

The security scan identified 34 findings across security headers, SSL/TLS, DNS health, email security, GDPR compliance, and NIS2 compliance analysis modules.

Technologies detected: HTML5, CSS3, JavaScript, MathJax, Jekyll.

About this security scan

Guard performs automated security assessments of websites by analyzing SSL/TLS certificates, HTTP security headers, DNS configuration, email authentication protocols (SPF, DKIM, DMARC), GDPR compliance indicators, NIS2 directive compliance, network exposure, and AI-powered business intelligence. Each report provides domain-specific findings, risk scores, and actionable recommendations.

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Is kleppmann.com Safe? Security Analysis for Martin Kleppmann

https://kleppmann.com

Check if kleppmann.com is a scam or legitimate. Free security scan and reviews.

EducationUnited Kingdomsmall
HTML5CSS3JavaScriptMathJaxJekyll
Analyzed 10/10/2025Completed 11:55:58 PM5mo ago
58
Security Score
MEDIUM RISK

Above Education avg (55)

10,000+

Domains scanned

500+

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Domainkleppmann.com
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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

Dr. Martin Kleppmann's website serves as a comprehensive academic and professional platform showcasing his work as an Associate Professor at the University of Cambridge. The site highlights his research focus on local-first collaboration software and distributed systems security, his teaching activities, open source contributions, and a well-regarded book on data-intensive applications. The website targets academics, researchers, students, and professionals interested in distributed systems and cryptography. It also supports his research through Patreon and promotes his publications and conference talks. Technically, the website is built using Jekyll, with a clean and professional design that is mobile-optimized and accessible. It uses standard web technologies including HTML5, CSS3, JavaScript, and MathJax for mathematical rendering. The site performs well with fast loading times and clear navigation. However, it lacks some modern security headers and explicit HTTPS enforcement details are not available from the provided data. From a security perspective, the site does not expose sensitive data or use vulnerable libraries. There are no forms collecting sensitive user data, which reduces attack surface. However, the absence of privacy and cookie policies, security incident response information, and vulnerability disclosure mechanisms indicates gaps in compliance and security transparency. The WHOIS data for the domain is missing, which is unusual and reduces trustworthiness, though the professional nature of the content suggests legitimacy. Overall, the website is a high-quality academic resource with excellent content and user experience but could improve in privacy compliance and security transparency. The missing WHOIS data is a concern that should be investigated further to confirm domain legitimacy.

Detected Technologies

HTML5CSS3JavaScriptMathJaxJekyll

10 urgent findings need attention

10 high

  • + 2 more findings in the full report below
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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

8 findings

15/100

GDPR Compliance

4 findings

53/100

NIS2 Compliance

8 findings

17/100

Email Security

5 findings

60/100

🧠AI Business Intelligence

Technology stack, business insights, and market analysis powered by AI.

Business Intelligence

Market & Strategic Analysis

The website positions Dr. Martin Kleppmann as a leading academic and researcher in distributed systems and cryptography. His competitive advantage lies in his authoritative publications, including a popular book and numerous peer-reviewed papers, as well as his involvement in open source projects and conference speaking engagements. The business model is primarily academic dissemination and personal branding, supplemented by book sales and Patreon support. The target customers are academics, students, and professionals in technology and education sectors. Growth indicators include ongoing publications, upcoming book editions, and active participation in conferences. The partnership ecosystem includes academic institutions and open source communities. Strategic observations note a strong reputation and trustworthiness but highlight the need for improved privacy and security policies to align with modern compliance standards.

Security Posture Analysis

Comprehensive Security Assessment

The website demonstrates a moderate security maturity level. It benefits from minimal attack surface due to lack of forms and sensitive data collection. However, the absence of security headers, privacy and cookie policies, and incident response information indicates gaps in security best practices and compliance. The missing WHOIS data is a notable concern that impacts trust and domain legitimacy assessment. There is no evidence of vulnerabilities or malware, but the site would benefit from implementing security headers, HTTPS enforcement, and publishing a security policy. Compliance with GDPR and other data protection regulations is not evident, which could pose risks if personal data collection increases in the future. Incident response readiness and vulnerability disclosure mechanisms are absent, limiting transparency and trust.

Strategic Recommendations

Priority Actions for Security Improvement

1

Implement and enforce HTTPS with strong TLS configuration and verify SSL certificates.

Observations

AI-powered comprehensive website and business analysis.

AI-Enhanced Website Analysis

Business Insights

Company:

Martin Kleppmann

Description:

Personal academic and professional website of Dr. Martin Kleppmann, Associate Professor at University of Cambridge, focusing on local-first collaboration software, distributed systems security, teaching, research, and publications including a well-known book on data-intensive applications.

Key Services:
Academic researchTeachingOpen source software developmentBook publicationPublic speaking and conference talks
Content Quality:

excellent

Branding:

consistent

Technical Stack

Technologies:
HTML5CSS3JavaScriptMathJaxJekyll
Frameworks:
Jekyll
Performance:

fast

Mobile:

good

Accessibility:

good

SEO:

good

Security Assessment

Security Score:
70/100
Best Practices:
  • No forms with sensitive inputs detected
  • No exposed sensitive data in HTML

Analytics & Tracking

Tracking Level:minimal
Privacy Compliance:poor

Advertising & Marketing

Transparency Level:basic

Website Quality Assessment

Design Quality:good
User Experience:good
Content Relevance:excellent
Navigation Clarity:good
Professionalism:excellent
Trustworthiness:high

Key Observations

1

Website is a personal academic site for Dr. Martin Kleppmann.

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🛡️Security Headers

HTTP security headers analysis and recommendations.

Security Headers

HTTP security headers analysis

15/100
Score

Missing Strict-Transport-Security header

HIGH

Forces HTTPS connections

Missing X-Frame-Options header

HIGH

Prevents clickjacking attacks

Missing X-Content-Type-Options header

MEDIUM

Prevents MIME type sniffing

Missing Content-Security-Policy header

HIGH

Controls resources the browser is allowed to load

Missing X-XSS-Protection header

MEDIUM

Legacy XSS protection (deprecated but still recommended)

Missing Referrer-Policy header

LOW

Controls referrer information sent with requests

Missing Permissions-Policy header

MEDIUM

Controls browser features and APIs

Sensitive data may be cached

LOW

Cache-Control header should include "no-store" for sensitive pages

👤GDPR Compliance

Privacy and data protection assessment under GDPR regulations.

GDPR Compliance

Privacy and data protection assessment

53/100
Score

No Cookie Policy found

HIGH

GDPR requires clear information about cookie usage

No Cookie Consent Banner found

HIGH

GDPR requires explicit consent for non-essential cookies

No Data Protection Officer mentioned

LOW

Large organizations may need to designate a DPO under GDPR

Privacy policy may not be GDPR compliant

MEDIUM

Privacy policy lacks explicit GDPR compliance elements

GDPR Compliance Analysis

Privacy Policy85% confidence
Cookie Policy0% confidence
Contact Information Found90% confidence
phone

🛡️NIS2 Compliance

Network & Information Security Directive compliance assessment.

NIS2 Compliance

Network & Information Security Directive

17/100
Score

No information security framework found

HIGH

NIS2 requires documented cybersecurity and information security measures

No vulnerability disclosure policy

MEDIUM

NIS2 encourages coordinated vulnerability disclosure

No security policy documentation found

HIGH

NIS2 requires documented cybersecurity governance and risk management

No incident response procedures found

HIGH

NIS2 requires documented incident response and business continuity plans

No business continuity planning found

MEDIUM

NIS2 emphasizes operational resilience and business continuity

No security contact information

HIGH

NIS2 requires clear incident reporting channels

No vulnerability reporting mechanism

MEDIUM

Clear vulnerability reporting supports coordinated disclosure

No NIS2 reference found

LOW

Consider explicitly mentioning NIS2 compliance efforts

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📧Email Security

SPF, DKIM, and DMARC validation and email security assessment.

Email Security

SPF, DKIM, and DMARC validation

60/100
Score

DMARC not enforcing

MEDIUM

DMARC policy is set to "none"

No DKIM record found

MEDIUM

DKIM adds cryptographic signatures to emails

No BIMI Record

LOW

BIMI displays brand logos in email clients

No MTA-STS Policy

MEDIUM

MTA-STS enforces TLS for email delivery

No TLS-RPT Record

LOW

TLS-RPT provides reporting for email TLS issues

SPF
Sender Policy Framework
DKIM
DomainKeys Identified Mail
DMARC
Domain-based Message Authentication
MX Records
Mail Exchange Records
BIMI
Brand Indicators
MTA-STS
Mail Transfer Agent Security
TLS-RPT
TLS Reporting
DNSSEC
DNS Security
SPF Details
Record:
v=spf1 a mx include:spf.messagingengine.com ~all
DNS Lookups:3/10
Policy:~all
DMARC Details
Policy:none
Aggregate Reports:40e979df0fcd4804ac75a9a03a437b66@dmarc-reports.cloudflare.net

🏆SSL/TLS Security

Certificate validity and encryption analysis.

SSL/TLS Security

Certificate validity and encryption analysis

65/100
Score

SSL Certificate Expires Within 90 Days

MEDIUM

SSL certificate expires in 62 days

Weak SSL Key Length

HIGH

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

Mixed Content Detected

MEDIUM

14 resources loaded over insecure HTTP

Partial SSL/TLS Assessment

LOW

Completed 2 of 4 security checks due to time constraints

Certificate Details

Subject:kleppmann.com
Issuer:WE1
Valid Until:12/12/2025 (62 days)
SANs:kleppmann.com, *.kleppmann.com

OCSP Status

OCSP Stapling Disabled

📊DNS Health

DNS configuration and security assessment.

DNS Health

DNS configuration and security assessment

75/100
Score

DNSSEC Not Enabled

MEDIUM

DNSSEC is not configured for this domain

CAA Records Not Configured

LOW

Certificate Authority Authorization (CAA) records not found

Domain Delete Lock Not Enabled

LOW

Domain can be deleted without additional verification

DMARC Policy Set to None

LOW

DMARC is configured but not enforcing any policy

Domain Registration Details

Domain Age
16 years(mature)
Expiry Risk
low(173 days)
Protection Level
basicDNSSEC OFF

DNS Records

A Records:188.114.97.1, 188.114.96.1
AAAA Records:2606:4700:3037::6815:2bef, 2606:4700:3036::ac43:bd05
Name Servers:
may.ns.cloudflare.com
rick.ns.cloudflare.com
MX Records:
20: in2.smtp.messagingengine.com
10: in1.smtp.messagingengine.com
SOA:Serial: 2383882519, TTL: 1800s

DNSSEC Status

DNSSEC Not Enabled

DNS Performance

Resolution Time:64ms

SPF Analysis

SPF Record:
v=spf1 a mx include:spf.messagingengine.com ~all

Network Security

Port scanning and network exposure analysis.

Network Security

Port scanning and network exposure analysis

100/100
Score

Good Network Security Posture

LOW

No unnecessary services detected on common risky ports

How does kleppmann.com compare?

See how kleppmann.com stacks up against similar websites in the same industry.

🔧Technical Analysis

Detailed technical findings and analysis from AI assessment.

Technical Analysis

Comprehensive security assessment findings

Additional Findings

The website is built on a static site generator (Jekyll) with clean HTML5 and CSS3, enhanced by JavaScript and MathJax for mathematical content. It has a fast performance profile and is mobile-optimized with good accessibility features. The site uses external resources hosted on reputable domains. There is no evidence of heavy analytics or tracking scripts, which supports privacy. The technical stack is modern but could be improved with additional security headers and HTTPS enforcement verification. The lack of dynamic forms reduces complexity and security risks but also limits interactive capabilities. Overall, the technical infrastructure is solid for an academic personal website but could benefit from enhanced security and privacy features.
Professional PDF & Marketing Data

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PDF Report & Export

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39.90 €one-time • Incl. 21% VAT

Marketing Intelligence

Contact emails, phone numbers & warm leads

49.90 €one-time • Incl. 21% VAT

Plan Comparison

FeaturePDF ReportMarketing+
Full security analysis
Professional PDF export
Email delivery
Lifetime access + unlock code
Contact emails & phones
Marketing outreach data

Already purchased?

Order summary

Domainkleppmann.com
Access tierFull report or marketing add-on

Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.

VisaMastercardApple PayGoogle Pay

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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