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Field notes / Mobile security & backend APIs

Practical security field guides.

Two focused resources that start with the trust boundary, show what a backend must verify, and link to runnable, synthetic demonstrations. They are teaching references, not evidence of third-party security assessments.

Mobile device integrity / iOS & Android

App Attest vs Play Integrity: what a backend can verify

Both APIs help evaluate whether a mobile request comes from an expected app or environment. Neither proves that a signed-in user can access a particular resource. The backend still owns that decision.

Read the guide

API security / authorization / reliability

API replay and authorization testing: five failure cases

A token can be valid while the operation is still unsafe. Test object access, editable fields, one-time evidence, and concurrent writes separately—and verify the server rejects each broken assumption.

Read the guide

Take the review checklist

A plain Markdown checklist for authorized, reproducible mobile API reviews. Includes request-binding, authorization, replay, concurrency, and logging checks. No accounts or data collection required.

Download the security review checklist