indexo.dev

cryptool.org

.org crawl

First seen 2026-04-13 · Last seen 2026-05-14 · ok HTTP/1.1 200 1333 ms crawled 2026-05-07

DE · 78.47.113.251 · AS24940 Hetzner Online GmbH

Reputation 100/100

Classifying

HTML metadata

Title
Homepage – CrypTool
Description
Play with cryptological tools online, learn cryptology, and solve puzzles. We want to create interest in cryptology and raise awareness for cyber security.

Technology

Server
Apache
CMS
Next.js

Social

Registration

Registrar
Key-Systems GmbH
Created
2000-09-20
Expires
2030-09-20 1584 days left
Updated
2025-11-20
Name servers
  • ns1.domaindiscount24.net
  • ns2.domaindiscount24.net
  • ns3.domaindiscount24.net

DNS records live

NS
  • ns1.domaindiscount24.net
  • ns2.domaindiscount24.net
  • ns3.domaindiscount24.net
MX
  • 10 mx.mail.unibw.de

Email authentication strong

SPF
v=spf1 ip6:2a01:4f8:c2c:8d18::ac10:4d99 a:dchq.datcom-unibw.de a:mail.ansi.inf.unibw.de a:mail.unibw.de ~all
softfail (~all)
DMARC
v=DMARC1; p=reject; rua=mailto:dmarc+cryptool@swznet.de
policy: reject (enforced)
DKIM
  • mail: v=DKIM1; h=sha256; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzwBh01WUexHpgPFTaiVXxxH83J26x/s0ceEL5gzDB8aQ3SHEEUaNJGv/aARrSiKy7ibT…
  • dkim: v=DKIM1;k=rsa;t=s;s=email;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy71qTfbeboGQaF4oAo0Ddolb7REJWouo6wkSmMTUikhEx6P3TVTYRUdqip+H/pm2ZT+U…
selectors probed

Certificate (current)

R12
from 2026-04-29 to 2026-07-28
Expires in 70 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 95/100 Checked live page: https://www.cryptool.org/en/

present
  • strict-transport-security
  • content-security-policy
  • x-frame-options
  • x-content-type-options
  • referrer-policy
  • cross-origin-opener-policy
  • cross-origin-embedder-policy
findings
  • missing Permissions Policy
Header values
referrer-policy
same-origin
x-frame-options
sameorigin
x-content-type-options
nosniff
content-security-policy
upgrade-insecure-requests, frame-ancestors 'self' https://it-sicherheit.de/
strict-transport-security
max-age=31536000; includeSubDomains; preload
cross-origin-opener-policy
same-origin
cross-origin-embedder-policy
require-corp

Links to (3)

Linked from (2)