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

How modern architectures secure east-west microservice traffic with mTLS

In the age of microservices, the old castle-and-moat security model is obsolete. We no longer have a single, hardened perimeter to defend. Instead, we have a dynamic, distributed landscape of services...

Tim Henrich

Dec 15, 2025

6 min read

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Security Insights

Implementing certificate-based authentication to replace shared API keys

In a world driven by Zero Trust principles, traditional API security models are showing their age. API keys, bearer tokens, and IP allow-lists—once the mainstays of service-to-service communication—ar...

Tim Henrich

Dec 12, 2025

8 min read

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Security Insights

How browsers validate TLS certificate chains from root to leaf

It’s the alert that makes every DevOps engineer’s heart sink: users are reporting scary browser warnings, APIs are failing, and a critical service is effectively offline. The cause? Not a server crash...

Tim Henrich

Dec 10, 2025

9 min read

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Security Insights

Fixing SSL handshake errors and automating renewals to prevent downtime

It’s 3 AM, and the alerts are firing. Your primary API is down, customers are complaining, and the initial logs show a cryptic error. After a frantic hour of debugging, you find the culprit: a miscon...

Tim Henrich

Dec 09, 2025

8 min read

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Security Insights

The Modern Guide to Certificate Pinning: Balancing Security and Sanity

Certificate pinning is one of the most powerful—and most feared—security controls in an engineer's toolkit. In theory, it offers the ultimate defense against Man-in-the-Middle (MITM) attacks by ensuri...

Tim Henrich

Dec 08, 2025

7 min read

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Security Insights

Safe mobile certificate pinning blocks man-in-the-middle attacks without bricking applications

Certificate pinning is one of the most powerful security controls you can implement in a mobile application. When done correctly, it provides a nearly ironclad defense against man-in-the-middle (MITM)...

Tim Henrich

Dec 08, 2025

8 min read

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Knowledge Hub

How modern architectures secure east-west microservice traffic with mTLS

Implementing certificate-based authentication to replace shared API keys

How browsers validate TLS certificate chains from root to leaf

Fixing SSL handshake errors and automating renewals to prevent downtime

The Modern Guide to Certificate Pinning: Balancing Security and Sanity

Safe mobile certificate pinning blocks man-in-the-middle attacks without bricking applications

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