Security by Default in Modern SaaS

The most common security failures are not exotic exploits. They are defaults that asked too much of the user: a permission left open, a token that never expired, a setting nobody understood. Security by default means the safe choice is the easy choice.

Least privilege, always

Every component, service, and credential should have exactly the access it needs and nothing more. When access is scoped tightly from the start, a mistake stays contained instead of cascading.

// Scope tokens to intent, expire aggressively
const token = issueToken({
  scope: ['orders:read'],
  ttlSeconds: 900,
});

Make the secure path the default path

• Encrypt in transit and at rest without anyone opting in.
• Rotate secrets automatically, not when someone remembers.
• Log access in a way that is useful during an incident, not after.

“If staying secure requires discipline from the user, you have designed the security wrong.”

— Rohan Mehta

Good security is quiet. Users should never have to think about it, because the system has already made the safe choice on their behalf.