What Is Cloud Security?
Organizations moved to the cloud expecting that someone else would handle security. The provider handles the hardware, the physical layer, the hypervisor. The reasoning that followed, that security was therefore someone else's problem, has produced some of the most consequential breaches of the last decade. The cloud changed the attack surface. It didn't eliminate the defender's responsibility. …
- The shared responsibility model means everything above the hypervisor is your problem to secure.
- Identity is the cloud perimeter, IAM misconfiguration is the most common breach vector.
- Misconfiguration, not sophisticated attacks, drives the majority of cloud security incidents.
- Policy-as-code enforced at deployment time costs seconds; discovered in an incident report costs weeks.
Identity Is The Real Perimeter
In traditional infrastructure, network topology was the primary security boundary. Firewalls enforced who could reach what. VLANs created zones. Physical access to a server rack was a meaningful control. Cloud infrastructure dismantled this model. Every resource has an API endpoint. Every API endpoint is reachable from anywhere with valid credentials. The network boundary is a soft control at best. The consequence is that identity and access management, IAM, is the foundational layer of cloud s
Misconfiguration Drives More Incidents Than Sophisticated Attacks
The security narrative is dominated by sophisticated adversaries, nation-state actors, zero-day exploits, advanced persistent threats. The operational reality is that the majority of cloud incidents are caused by misconfiguration. A publicly accessible storage bucket. An overly permissive IAM policy. A security group rule that opens port 22 to the internet. These aren't sophisticated attacks. They're configuration errors that an attacker found before the owner did. Tools like AWS Config, Azure
Frequently asked questions
- Where should a team with no existing cloud security program start?
- Start with IAM. Audit every role, every user, every service account for permissions they don't need. Enable CloudTrail or the equivalent audit logging in your provider. Turn on your cloud provider's native security benchmarking tool, AWS Security Hub, GCP Security Command Center, Azure Defender. These three steps will surface the majority of your …
- How do you handle cloud security when the team is moving fast and security reviews slow things down?
- The answer is to move the security check left, not to remove it. If your security review happens at merge request time or deployment time, it's too late to be cheap. If it happens at infrastructure-as-code plan time, Conftest policies running in CI against Terraform plans, it costs seconds and gives developers immediate feedback. Fast teams don't …
- What's the difference between cloud security and traditional on-premises security?
- The attack surface, the control model, and the threat model are all different. On-premises, the perimeter is physical and network-defined. In the cloud, the perimeter is identity-defined, every resource has an API, and the configuration surface area is orders of magnitude larger. Misconfiguration replaces physical intrusion as the primary risk vec…
- How does the shared responsibility model actually break down in practice for SaaS companies?
- For most SaaS companies, the practical gap is IAM configuration. The cloud provider secures the S3 API; the customer is responsible for every bucket policy and access control decision on top of it. In practice, teams learn this the hard way, a public bucket, an overpermissioned role, an unrotated key, because the shared responsibility model doesn'…
- Why do cloud security misconfigurations keep happening even with CSPM tools in place?
- Because detection is not the same as prevention, and CSPM tools find problems after they already exist. The deeper issue is that misconfigurations happen at the pace of infrastructure change, new resources, new permissions, new service integrations, and most teams don't have a feedback loop tight enough to catch them before production. The teams t…