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A school report card for your website: security headers, e-mail protection and certificate, graded like at school

A school report card for your website: security headers, e-mail protection and certificate, graded like at school

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2 min read
Read a TLS certificate's dates with openssl, and make sure it's the right certificate

Read a TLS certificate's dates with openssl, and make sure it's the right certificate

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3 min read
A TLS syslog tunnel is not authenticated until both ends verify certificates

A TLS syslog tunnel is not authenticated until both ends verify certificates

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3 min read
Resolving GitHub Pages InvalidDNSError: A Critical Guide for Planning a Software Project

Resolving GitHub Pages InvalidDNSError: A Critical Guide for Planning a Software Project

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5 min read
How TLS Protects Your Internet Connection: The Complete Guide

How TLS Protects Your Internet Connection: The Complete Guide

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12 min read
mTLS vs TLS erklärt: Zwei Identitäten, eine Verbindung

mTLS vs TLS erklärt: Zwei Identitäten, eine Verbindung

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11 min read
eMudhra CA Compromise: Two Roots to Remove, and Dropping Comodo AAA Broke 1 of 16,125 Chains

eMudhra CA Compromise: Two Roots to Remove, and Dropping Comodo AAA Broke 1 of 16,125 Chains

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16 min read
Reading X.509 Certificates by Hand: SANs, Key Usage, Chains & Intermediates

Reading X.509 Certificates by Hand: SANs, Key Usage, Chains & Intermediates

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7 min read
After the eMudhra CA compromise: audit your own TLS stack in 30 minutes

After the eMudhra CA compromise: audit your own TLS stack in 30 minutes

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7 min read
Leaked TLS Private Keys: Proving Compromise, Finding Every Affected Cert & Rotating Safely

Leaked TLS Private Keys: Proving Compromise, Finding Every Affected Cert & Rotating Safely

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6 min read
Patching CVE-2026-105483 across a mixed Node.js estate

Patching CVE-2026-105483 across a mixed Node.js estate

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4 min read
CVE-2026-105483: when an IPv4 address is checked as a DNS name

CVE-2026-105483: when an IPv4 address is checked as a DNS name

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4 min read
CVE-2026-105483: certificate SAN policy decides the risk

CVE-2026-105483: certificate SAN policy decides the risk

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4 min read
Auditing Node.js code for the CVE-2026-105483 TLS identity mismatch

Auditing Node.js code for the CVE-2026-105483 TLS identity mismatch

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4 min read
Measuring CVE-2026-105483 exposure without overstating it

Measuring CVE-2026-105483 exposure without overstating it

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4 min read
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