Modified Blowfish Encryption Standard with Optimization Strategy for Secured Cloud Storage with Data Dynamics

Organizations and individuals can store, transport, and backup a rising quantity of data at an affordable cost through the assistance of cloud storage service providers, who also give them access to other cloud services. Cloud service providers use the most popular separation approach to offer effective data storage as it reduces upload capacity and storage expenses by allowing the storage of only one instance of data while eliminating multiple copies. When customers upload data to the cloud, their primary concerns are related to data security, integrity, privacy, and confidentiality. It is not advised to use traditional encryption, which is typically used to encrypt data when outsourcing, since it interferes with the data dynamics technique. This study suggested a new security architecture for cloud data storage using modified blowfish encryption to rectify these kinds of problems. Secure storage, outsourcing, and the proxy-re-encryption phase are the three stages. During the secure storage phase, a modified version of the blowfish technique is suggested for data encryption. The Kookaburra optimization algorithm is utilized for obtaining the optimal key. Auditing, proof, verification, File Access request, and file download are the five processes that occur throughout the outsourcing phase. Ultimately, the final stage of the suggested work is proxy re-encryption. In this case, the data user requests a key for a proxy, where the data owner has already transmitted the encrypted data key and the proxy provides the data user access to the encoded key. Lastly, a comparison of the suggested approach with various security methods validates its superiority.