Shared Responsibility Model
Cloud security is the responsibility of both parties: cloud providers are responsible for the security of the cloud itself (data centers, physical security, infrastructure), while customers are responsible for the security of the cloud (configuration, access control, data encryption).
Common configuration errors
S3 storage bucket public access, database public network exposure, security group 0.0.0.0/0 allows all ports, IAM permissions are too wide, MFA is not enabled, forgotten to encrypt storage.
Best Practices for Protection
Minimum privilege principle, enabling MFA, regularly auditing configuration (using tools such as AWS Config, CloudTrail), encrypting static data and data in transit, network segmentation.
Accident Case
Capital One data breach: S3 bucket configuration error resulted in 100 million customer data breaches. Misconfig is the top risk in cloud security, surpassing technical vulnerabilities.
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