Suthahar Jegatheesan MSDEVBUILD / blog Multi-Stack Dev Build · by Suthahar
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What Happens When You Hardcode an API Key

Stealing it costs hours. Rotating it can cost days.

What you'll learn

  • Why a leaked key costs money long before anyone notices it leaked
  • Why rotating a hard-coded key kills every installed copy of your app
  • Why a secret in Azure Key Vault rotates with nobody updating anything
Azure Security 8 steps 26 seconds —views

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Understand it one step at a time

The short runs these in order in about 26 seconds. Here they are written out — pick any step to jump the short straight to it.

1 Step 1 of 8

One line, shipped

A key hard-coded in the app, shipped on forty thousand phones — everyone says don’t do this, and here it is anyway.

Frequently asked questions

Why is revoking a hardcoded key harder than it sounds?
The key is embedded in every installed copy of the app, so revoking it to stop an attacker breaks every legitimate customer at the same instant — turning one incident into an outage on top of it.
What's the safe order of operations when a key leaks?
Check whether it's already being used, ship (or front) the version that no longer needs it, swap traffic to the service's secondary key, then regenerate the primary and repeat for the secondary. Doing this out of order is what causes the second outage.

Free app · no app store

These are built for a phone

Every short is drawn at full portrait height, the shape a phone already is. Installed, it opens full-bleed with no address bar across the top — and the whole library reads offline.

How it works

Read deeper on Azure

Twenty seconds gets the shape of an idea across. These go into how it behaves in production.

More shorts

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