What is Cloud Security?
Cloud security is how you protect the data, apps, and accounts you run in services like Microsoft 365, Google Workspace, and AWS — and most of that responsibility is yours, not the provider's.
Your stuff lives on someone else's computers. Now protect it.
"The cloud" just means renting computing — storage, software, servers — from a provider like Microsoft, Google, or Amazon instead of running it on machines in your own office. Cloud security is everything you do to keep the data, applications, and user accounts you've put there safe: controlling who can log in, protecting the data itself, and watching for misuse.
Here's the part that surprises business owners: moving to the cloud does not hand all your security to the provider. It changes which parts are yours. The provider runs a far more secure data center than you ever could — but they hand you the keys to your own accounts and settings, and what you do with those keys is on you. The vast majority of cloud breaches aren't the provider getting hacked; they're a customer leaving a door wide open.
The shared responsibility model.
Every cloud provider draws a line between what they secure and what you secure. Think of it like renting an apartment: the landlord secures the building, the foundation, the locks on the main entrance. But you're the one who has to lock your own apartment door and not hand out copies of the key.
What the provider secures
The physical data centers, the hardware, the network backbone, and the core platform. This is world-class security you couldn't easily replicate yourself — and it's why the cloud is genuinely safer for most SMBs than a server in the closet.
What you secure
Your data, your user accounts, and your configuration: who has access, whether logins require multi-factor authentication, and whether your storage is private or accidentally public. This is where breaches happen.
Misunderstand this line and you'll assume you're protected when you're not. Most cloud incidents are a customer-side misconfiguration — a public storage bucket, an over-permissioned account, or a login with no MFA.
Where cloud security goes wrong.
- Misconfiguration. Storage left open to the internet, or default settings no one tightened — the single most common cause of cloud data leaks.
- Account takeover. A phished or reused password lets an attacker straight into your Microsoft 365 or Google Workspace. Without MFA, one stolen password is game over.
- Too much access. Giving every employee admin-level permissions "to keep things simple." When one account is compromised, the attacker inherits all of it.
- Shadow IT. Staff signing up for cloud apps no one's tracking, quietly expanding your attack surface.
The cloud security basics that prevent most breaches.
- Turn on MFA everywhere. On every cloud account, no exceptions. It's the single highest-impact thing you can do, and it stops the most common attack cold.
- Give the least access needed. People (and apps) should have only the permissions their job requires — nothing more. Review who's an admin.
- Check your configuration. Make sure no storage is public by accident and that security settings aren't left at insecure defaults. Cloud providers offer free tools that flag this.
- Know your compliance obligations. If you handle health, payment, or customer data, a framework like HIPAA, PCI, or SOC 2 likely applies — and the cloud doesn't satisfy it automatically.
Not sure which compliance framework you're actually on the hook for in the cloud? Red Hound's free advisor, Focus, asks a few questions about your business and tells you exactly which one applies — with citations to the real rule.
Cloud security, answered.
What is cloud security?
Cloud security is the set of practices and tools that protect the data, applications, and accounts you run in cloud services like Microsoft 365, Google Workspace, AWS, or Azure. It covers who can access what, how data is protected, and how you spot misuse.
Isn't the cloud provider responsible for security?
Only partly. Under the shared responsibility model, the provider secures the underlying infrastructure, but you are responsible for your data, your user accounts, and your configuration. The large majority of cloud breaches trace back to a customer mistake, not a provider failure.
What is the most common cause of cloud breaches?
Misconfiguration and weak access control — a storage bucket left public, an account without multi-factor authentication, or overly broad permissions. These are customer-side settings, which is why getting your configuration right matters more than almost anything else.
Does moving to the cloud help with compliance?
It can, because major providers offer compliant infrastructure and helpful tooling — but you still have to configure and operate it correctly to meet a framework like SOC 2, HIPAA, or PCI. The cloud gives you a head start, not an automatic pass.
Related topics
- What is Multi-Factor Authentication? — the top defense for cloud accounts.
- What is Zero Trust? — the access model built for a cloud-first world.
- What is an Attack Surface? — why the cloud expands yours.
- What is a Data Breach? — what cloud misconfiguration leads to.
- Free guide: Which compliance framework applies to you?
Find which compliance framework applies to you — free with Focus.
Answer a few questions about your business and get the right framework, with citations to the actual rule.
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