weakdh.org

https://weakdh.org· First analyzed 07 May 2026· Updated 07 May 2026

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weakdh.org

Mobile

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Hosting Provider

GitHub Pages

pages.github.com

IP Address

185.199.111.153

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

ns-cloud-e1.googledomains.com.ns-cloud-e4.googledomains.com.ns-cloud-e3.googledomains.com.ns-cloud-e2.googledomains.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

713 ms10%

Speed Index

927 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

37 KB

8 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Platform

GitHub Pages

CDN

Fastly

Technology Stack

2 Technologies Detected

Libraries

jQueryv1.11.1

CSS Frameworks

Bootstrapv3.3.0

SEO Analysis

D47/100

Meta Tags10/15

Content11/12

Headings5/8

Technical5/21

E-E-A-T0/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile2/4

Indexability3/3

weakdh.orgweakdh.org

Weak Diffie-Hellman and the Logjam Attack

Title Length41 chars

Recommended: 50-60 chars (~253px / 580px)

Description Length41 chars

Recommended: 120-160 chars

Issues (2)

• Most images missing alt text (1/1) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

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Local SEO

Local Search Readiness

2/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F38/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

7/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:49%

Words:844

Token eff.:Optimal

Sections/1K:5.9

Structured Data

No Schema

Citation Readiness

Opening Summary40w

Descriptive Headingsavg 3w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

53/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

8/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

58/100

A+

5 mg

CO₂e / view

37.0 KB

Page Weight

95%

Cleaner Than

New Visitor

5 mg

Returning (cached)

3 mg

Annual (10K/mo)

552 g

Emission Segments

Data Center

1 mg

Network

1 mg

Device

3 mg

Resource Breakdown

JavaScript

9.7 KB

CSS

22.9 KB

HTML

4.4 KB

Green Hosting Not Verified

GitHub Pages

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

71%Good

Static / Informational

HTTPS

No WAF

77d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

24.04.2026

Valid Until

23.07.2026

Subject Alternative Names (1)

weakdh.org

SHA-256 Fingerprint

F4:96:02:E2:38:1C:6D:7F:E5:43:B4:19:2F:D1:1D:7E:C6:A7:5B:2A...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

cache-control

🟡 600s(max-age=600)

content-encoding

📦 Gzip(gzip)

content-length

4256

Good Warning Issue

Email Infrastructure

GoDaddy Email

Score

SPF

DKIM

DMARC

MX Records (2)

mailstore1.secureserver.net

smtp.secureserver.net

Domain Information

weakdh.org

Domain Age

11 years

Created

05.05.2015

Expires

05.05.2027

Last Updated

26.04.2026

Registrar

Squarespace Domains II LLC

DNSSEC

Not Enabled

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

36/100

Not Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica Neue

WCAG Partial

74/100

Readability

/30

22/30

15px · LH 1.43

Hierarchy

/20

14/20

2.42x ratio

WCAG

/25

19/25

4.42:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Helvetica Neue

Sans37px

Body Font

Helvetica Neue

Sans15px

Contrast Ratio

4.42:1

2 issues

Reading Comfort

~40 CPL

Narrow lines

37px

26px

19px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

⚠️ Hard to read: Flesch score 43/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 4.4:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 2.4x larger than body text.

Flesch 43

Color Palette

8 unique colors

4.67:1 AA Light

#ffffff

Background· 80.4%

#747475

Other· 2.8%

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Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

track.gaug.es(1)code.jquery.com(1)maxcdn.bootstrapcdn.com(1)

Website Identity

weakdh.org

weakdh-team@umich.edu

11 years old

Location detected: 🇺🇸 United Statesvia ip

Squarespace Domains II LLC📧 GoDaddy Email

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Last analyzed: 07 May 2026 at 07:20

Historical Analysis & Change Tracking