Secured Cloud Storage via Improved EL-GAMAL Standard and Access Control: Improved Information Flow Control Mechanism Via Obfuscation Process

The increasing reliance on cloud storage has highlighted significant security concerns, particularly in data confidentiality and unauthorised access. Traditional encryption methods, such as the Elgamal cryptosystem, are insufficient to address the evolving security demands and the need for integrated access control. This paper suggests a new method that uses proxy re-encryption, access control and enhanced encryption to increase the security of cloud storage. It is divided into the following three major stages: (1) Secured Cloud storage (2) Access Control and (3) Proxy re-encryption. Secure cloud storage is where data is stored, and it’s critical to guard against damaging external attacks as well as internal data leaks. The data will be encrypted to lessen this issue. An enhanced Elgamal technique is used to safely store the customers’ data on the cloud. The central authority is in charge of gaining access to the data that is kept in the cloud. To access the data through an obfuscation process, an enhanced information flow control system is suggested. This procedure applies additional encryption utilising the Improved Light Weight Key Management (ILWKM) technology, which encrypts the data by adopting a session key through a tent map. Initially, the user and the central authority authenticate each other. Only the authenticated user will have access to the cloud’s data when a proxy key is used. The proxy re-encryption process uses the session key as a proxy key. The proxy uses the session key to re-encrypt the data before sending it to the authorised user. The user uses an inverted tent map to decrypt the data. Finally, the performance of the improved Elgamal approach is evaluated over conventional approaches with regard to different types of attacks. The improved Elgamal scheme achieves lesser ratings of 0.024 in CCA attacks as well as achieved the shortest encryption time, at just 0.0001 s when compared to other traditional schemes.