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Security Guides

After the workshop: turning lessons into real engineering work

Training only pays off if code changes. Seven steps for converting workshop commitments and CTF findings into tickets, tests, review rules and a re-check.

Oct 18, 20263 min read
Security Guides

AES-GCM nonce reuse and key usage limits for developers

AES-GCM needs a unique IV for every encryption under a key. What that means in practice, why libraries should handle it, and the usage cap OWASP gives.

Oct 18, 20263 min read
Security Guides

Adversary emulation or penetration test: which one do you need?

A penetration test hunts for flaws, while adversary emulation tests defenses against a specific attacker playbook. How to decide, using MITRE ATT&CK.

Oct 18, 20263 min read
Security Guides

An ADR template with a security section you can copy

A one page architecture decision record template that adds threat, data and rollback questions so security reasoning is written down at decision time.

Oct 18, 20264 min read
Security Guides

Admission webhook timeouts and failure policy: fail open or fail closed?

A slow or down webhook is handled by its failure policy. Fail closed blocks deployments, fail open skips the check. How to choose and how to tune timeouts.

Oct 18, 20263 min read
Security Guides

Admission webhook matching gaps: matchPolicy and selectors

A webhook only protects what it matches. Equivalent matchPolicy, opt-in object selectors and namespace selectors can each leave a gap. Check them.

Oct 18, 20263 min read
Security Guides

Adding up EPSS scores: how many of your findings may be exploited?

Because EPSS is a calibrated probability, you can sum it across your backlog for an expected count. Here is the math, a worked example and its limits.

Oct 18, 20264 min read
Security Guides

Acceptable use policy for an AI product: enforcement basics

A policy no one enforces does nothing. What an AI product's acceptable use policy should cover and the steps from detection to suspension and appeal.

Oct 18, 20264 min read
Security Guides

A clean vulnerability scan does not mean your software is safe

Zero findings from a dependency scan only means no known issues matched. Here is what a clean result leaves out and what to check next before release.

Oct 18, 20263 min read

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