A Cloud Secure Storage Mechanism Based On Data Dispersion and Encryption

Cloud storage service has shown its great power and wide popularity which provides fundamental support for the rapid development of cloud computing. However, due to management negligence and malicious attack, there still lie enormous security incidents that lead to quantities of sensitive data leakage at the cloud storage layer. From the perspective of protecting cloud data confidentiality, this paper proposed a Cloud Secure Storage Mechanism named CSSM. To avoid data breaches at the storage layer, CSSM integrated data dispersion and distributed storage to realize encrypted, chucked, and distributed storage. In addition, CSSM adopted a hierarchical management approach and combined user passwords with secret sharing to prevent cryptographic materials leakage. The experimental results indicate that the proposed mechanism is not only suitable for ensuring the data security at storage layer from leakage, but also can store huge amount of cloud data effectively without imposing too much time overhead. For example, when users upload/download 5G sized file with CSSM, it only takes 646seconds/269seconds, which is acceptable for users