Although the development of cloud computing has led to a paradigm shift in the data storage, it has also subjected the sensitive information to massive security and performance threats; that is, the data integrity and processing overhead. There is a basic trade-off in classical cryptography: the symmetrickey protocols are really fast, whereas they do not provide secure exchange of keys, but the asymmetrickey protocols are very secure and computationally infeasible when dealing with large amounts of data. Conventional cryptographic techniques commonly have a fundamental dilemma: symmetric-key protocols can offer fast execution but do not include any secure key-exchange protocols, whereas asymmetric-key systems can offer high protection but cannot be used with large volumes of data due to their slow computation speed. To alleviate these problems, this study presents a streamlined dualcipher architecture that is aimed at boosting the efficiency of the cloud through the integration of the AES-256 and RSA-2048. The intelligence of the system lies in a dynamic workload distribution mechanism such that the high-resource encapsulation of the RSA operations is limited to the encryption of keys, while the bulk encryption is left to the high-speed AES engine. The empirical assessment of different file sizes (1 MB to 1 GB) shows that a sustainable throughput of 56-72 MB/s is achieved at 83-86 percent of the functional speed of standalone AES. As a result, the suggested model provides a viable and scalable design for modern cloud infrastructures with a very low overhead of just 20-21 percent or so relative to single deployments of RSA.
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