Expert Insights & Best Practices

Knowledge Hub

Deep insights, real-world case studies, and proven strategies from the trenches of certificate and expiration management

Security Insights

The Ticking Clock: Calculating the ROI of Automated Certificate Management Before 90-Day Lifespans Arrive

In early 2023, a simple expired certificate brought Microsoft Teams to its knees, disrupting communication for thousands of users globally. This wasn't a sophisticated cyberattack or a complex system ...

Tim Henrich

Dec 23, 2025

7 min read

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Security Insights

The practical differences between PEM, PFX, and DER certificate formats

In February 2022, a global Microsoft Teams outage left millions of users unable to connect for hours. The culprit wasn't a network failure or a buggy deployment; it was a single, forgotten authenticat...

Tim Henrich

Dec 22, 2025

9 min read

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Security Insights

Auditing corporate domain portfolios to eliminate sprawl and shadow IT

In most enterprises, domain names are treated like office supplies: purchased when needed, managed by various teams, and only given attention when a renewal notice arrives. This decentralized, reactiv...

Tim Henrich

Dec 22, 2025

7 min read

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Security Insights

Replacing TLS certificate spreadsheets with Terraform and Kubernetes

In early 2023, a single expired internal TLS certificate brought down a swath of Microsoft Azure services, including Storage, SQL DB, and Cosmos DB. This wasn't a sophisticated cyberattack; it was a s...

Tim Henrich

Dec 19, 2025

8 min read

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Security Insights

Implementing mutual TLS to secure internal APIs without shareable secrets

In the world of API security, we've become comfortable with bearer tokens, API keys, and OAuth 2.0. These methods are effective for user authentication, but they share a common vulnerability: they rel...

Tim Henrich

Dec 19, 2025

8 min read

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Security Insights

Monitoring Certificate Transparency logs to detect malicious infrastructure

For years, IT and DevOps teams have viewed TLS certificates through a singular lens: expiration. The primary concern has been avoiding the dreaded "Your connection is not private" error that brings se...

Tim Henrich

Dec 18, 2025

7 min read

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Knowledge Hub

The Ticking Clock: Calculating the ROI of Automated Certificate Management Before 90-Day Lifespans Arrive

The practical differences between PEM, PFX, and DER certificate formats

Auditing corporate domain portfolios to eliminate sprawl and shadow IT

Replacing TLS certificate spreadsheets with Terraform and Kubernetes

Implementing mutual TLS to secure internal APIs without shareable secrets

Monitoring Certificate Transparency logs to detect malicious infrastructure

Topics

Featured

Quantifying the Real Cost of Certificate Outages on Modern Infrastructure

Securing DNS Infrastructure Against Subdomain Takeovers and Registrar Exploits

Automating Let's Encrypt Certificate Renewals Across Enterprise Infrastructure