Cloud security has attack third-party storage services in outsources data backups reduce data management costs. DDOS attack through compromised zombies. IDS secure overlay cloud storage system achieves policy-based, access control, file assured deletion. IDS built upon cryptographic Key operations that are independent of third-party clouds. It associates outsourced files with file access policy, assured deletes file make them unrecoverable anyone revocations using file access policies. While, introducing IDS only minimal performance and monetary cost overhead. Insights provide system and security evaluations demonstrate efficiency and effectiveness into today's cloud storage services.