Mahjong Chest is an online gaming platform specializing in Mahjong solitaire games, offering a wide variety of layouts and free play options. The site targets casual gamers and puzzle enthusiasts globally, with multilingual support and a business model based on advertising revenue supplemented by a premium subscription to remove ads. The platform is part of the Casual Games Collection brand, which operates multiple related casual game sites. Technically, the website uses a modern JavaScript stack with Bootstrap for UI, integrates Google Analytics and Adsense for tracking and monetization, and is hosted on infrastructure using Google Cloud DNS. The site is mobile-optimized and provides a good user experience with clear navigation and professional design. Security-wise, the site enforces HTTPS and has domain registration protections but lacks advanced DNS security (DNSSEC) and security headers. Privacy compliance is basic with a privacy policy and cookie management but lacks detailed GDPR statements or incident response information. No direct contact or security incident channels are provided, which limits transparency. Overall, the website is legitimate, functional, and safe for general audiences but could improve security and privacy practices.
Scanned ·
NIS2 and GDPR posture
GDPR outside view
68/ 100 · Medium
Checks completed
7of 7
NIS2 Art. 21(2)
a(a) Risk analysis and security policies: Not visible from outside
b(b) Incident handling: One indicator
c(c) Business continuity, backups and crisis management: Not visible from outside
d(d) Supply chain security: Not visible from outside
e(e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
f(f) Assessing the effectiveness of security measures: Not visible from outside
g(g) Cyber hygiene and security training: Not visible from outside
h(h) Cryptography and encryption: Partly checked
i(i) HR security, access control and asset management: One indicator
j(j) Multi-factor authentication and secured communications: Not visible from outside
Partly checked
One indicator
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.
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"
This scan found 24 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.
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
72
Security headers
15
Email security
70
DNS health
75
Network security
100
GDPR outside view
68
Average
67
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 mahjongchest.com, from OffSeq Breach.
No leaked records found
Breach holds no records for mahjongchest.com right now. New leaks arrive continuously, so monitoring on Breach alerts you if that changes.
Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.
Business context
Business profile
The website operates in the casual online gaming niche, focusing on Mahjong solitaire, a popular puzzle game. It leverages a freemium model with ad-supported free play and optional premium subscriptions. The presence of multiple related game sites under the Casual Games Collection umbrella suggests a strategy of cross-promotion and ecosystem building. The multilingual support indicates targeting of an international user base. The lack of direct contact information and limited privacy disclosures may reflect a small to medium-sized operation focused on user acquisition and engagement rather than direct customer service. Advertising and tracking are heavily used, indicating monetization reliance on ad revenue. The site’s domain age and registration details align with a legitimate business presence.
Security posture
The website has a good baseline security posture with HTTPS enabled and domain status flags preventing unauthorized domain transfer or deletion. However, the absence of DNSSEC reduces DNS security. No security headers such as Content-Security-Policy or X-Frame-Options were detected, which could expose the site to certain web attacks. There is no public vulnerability disclosure policy or security.txt file, limiting transparency for security researchers. Privacy policy is basic and lacks explicit GDPR compliance statements. No incident response or security contact information is provided. The extensive use of third-party advertising and tracking scripts increases the attack surface and privacy risks. Overall, the security posture is moderate but could be significantly improved with additional headers, DNSSEC, and transparency measures.
Recommendations
Enable DNSSEC to enhance DNS security and prevent spoofing.
Implement standard security headers such as Content-Security-Policy, X-Content-Type-Options, and X-Frame-Options.
Enhance privacy policy with explicit GDPR compliance statements and data retention policies.
Provide clear contact information for security incidents and consider publishing a vulnerability disclosure policy or security.txt file.
Review and minimize third-party tracking scripts to reduce privacy risks and improve user trust.
Site observations
Automated reading of the public site. Ratings are indicative.
Business
Company
Casual Games Collection
Description
Mahjong Chest is an online platform offering thousands of Mahjong solitaire games for free play. It provides various Mahjong layouts and related puzzle games, targeting casual gamers interested in Mahjong solitaire and similar puzzle games.
Key services
Online Mahjong solitaire games, Daily tasks and challenges, Premium subscription for ad removal
Content quality
good
Branding
consistent
Technology
Stack
JavaScript, jQuery, Bootstrap, Google Analytics, Google Adsense, FusePlatform, Prebid.js, Google Tag Manager
Frameworks
Bootstrap
Platforms
Web
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good
Security
Observed score
75/100
Good practices seen
HTTPS enforced
Domain status clientDeleteProhibited and clientTransferProhibited
Analytics and tracking
Services
Google Analytics, Google Tag Manager
Tracking level
extensive
Privacy practices
basic
Advertising
Ad networks
Google Adsense, Google DoubleClick
Tracking pixels
FusePlatform, Confiant
Transparency
basic
Site quality
Design
good
User experience
good
Content relevance
good
Navigation
good
Professionalism
good
Trustworthiness
moderate
Key observations
Website is fully accessible with no blocking or WAF challenge.
Content is focused on Mahjong solitaire games with a broad selection of layouts.
Multiple language options are available indicating international targeting.
No direct contact emails or phone numbers found on the site.
Privacy and terms pages are present but privacy policy is basic and lacks explicit GDPR compliance statements.
Advertising and tracking scripts are extensively used, indicating monetization via ads.
No explicit security policies or incident response information is provided.
No vulnerability disclosure or security.txt file found.
No business contact information or DPO details found.
Site uses HTTPS with good domain security status but lacks DNSSEC.
Technical notes
Notes
The website uses a modern JavaScript-based tech stack with jQuery and Bootstrap for UI components. It integrates multiple advertising and analytics services including Google Adsense, Google Analytics, Google Tag Manager, and FusePlatform. The site is hosted with DNS managed by Google Cloud DNS, with domain registration via Squarespace Domains II LLC. Performance is moderate with preconnect and preload optimizations for fonts and resources. The site is mobile-optimized and supports multiple languages, enhancing accessibility and SEO. However, the lack of DNSSEC and security headers indicates some technical debt in security best practices. The site’s reliance on third-party ad networks and tracking scripts is extensive, which may impact privacy and performance. Overall, the technical infrastructure is solid but could benefit from security hardening and privacy improvements.
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.
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