Secrets Management: The Complete Guide27kTalk to an expertGet started for free

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← Back<br>Blog post • 25 min read<br>Secrets Management: The Complete Guide to Protecting API Keys, Credentials & Certificates

Published onWednesday, May 20, 2026

Many cybersecurity attacks look less like an elaborate bank heist and more like opening a door with a key someone left in the lock. Take Uber, for example. In 2014, the company was breached after an engineer accidentally committed an AWS access key to a public GitHub repository. Threat actors used it to access over 100,000 drivers' personal data.

If simple breaches like this can happen to Uber, they can happen anywhere: Legacy brands like Toyota and Mercedes-Benz, government institutions like the U.S. Cybersecurity and Infrastructure Security Agency, as well as modern tech companies have had sensitive credentials leaked on GitHub.

These look like reckless mistakes (which they are), but they are the consequences of innocuous-seeming shortcuts compounding into devastating vulnerabilities:

Committing an API key for testing

DMing a new colleague an auth token to onboard them faster

Sending a website redesign contractor the same .env file your staff engineers use

Training won't fix this. Humans make mistakes and sometimes put convenience over security. The issue is a systemic problem called secret sprawl.

Secret sprawl is what happens when keys, tokens, certificates, and other sensitive data multiply across environments and services faster than any team can track. Nobody knows the full extent of what secrets exist, who can access them, or what risk they carry. Storing and sharing them with plaintext files and Slack messages works for a handful of secrets (albeit insecure), but becomes impossible to manage manually at scale.

Restrictive, manual policies (even if they were workable) would slow engineers down. Days of "why isn't this working anymore?" can pass until a new API key has been manually shared with everyone who needs it. The same applies to non-human identities: unexplained outages from expired database credentials create operational friction. The fast, convenient way to handle secrets isn't safe, but an extremely restrictive posture would slow operations to a crawl.

This is the core tension: Engineers and services need hundreds to thousands of secrets to operate, which need to be available at a moment's notice, without ever running the risk of being exposed.

This is the challenge of modern secrets management: it's an arms race to preempt threat actors equipped with AI that sniffs out both cutting-edge exploits and decade-old vulnerabilities in widely used infrastructure.

Centralized secrets management is essential to avoiding security incidents and (if they do happen), limit their blast radius while continuing to ship quickly.

What Is Secrets Management?

Secrets management is the practice of storing and sharing secrets.

Every developer, team, and company using secrets manages them one way or another, even if they never defined practices.

Bad secrets management is the cybersecurity equivalent of writing your PIN down on your credit card. Storing and sharing unencrypted secrets in plaintext files is a version of secrets management, but it's definitely not secure.

Good secrets management practices include access controls, audit logs, encrypted storage, and other best practices.

The goal of good secrets management is to avoid security breaches (and, if they do happen, respond quickly and limit their fallout) as well as downtime from applications missing what they need.

What counts as a secret?

A secret is sensitive information that grants access to something and could cause harm if leaked. A few examples of typical secrets:

API keys : bearer tokens for services like Stripe, OpenAI, Twilio, etc..

Database credentials and connection strings: postgres://user:password@host:5432/db.

SSH keys : private keys used to authenticate to servers and Git providers. Large organizations manage millions of them.

TLS/SSL certificate private keys : the keypairs that authenticate servers and encrypt traffic.

OAuth and service-account tokens : bearer tokens, often with broad scopes like repo:admin.

Encryption keys (DEKs and KEKs) : the symmetric keys that encrypt data at rest.

Cloud access keys : AWS AKIA… keys, GCP service account JSON files, Azure client secrets.

Others: Webhook secrets, JWT signing keys, code-signing certificates, container registry credentials, Helm and Artifactory tokens.

In the era of cloud development, the amount of secrets has exploded, creating a phenomenon called secret sprawl, in which nobody has a full overview on which secrets exist, where they are and who has access to them.

This is a critical issue because of the massive potential attack surface (millions of secrets that could theoretically be exposed) and the grave consequences if secrets are compromised (data exfiltration, ransomware...