Enhanced hierarchical attribute based encryption with modular padding for improved public auditing in cloud computing using semantic ontology

The problem of public auditing has been well studied in many research articles. The methods described earlier suffer to achieve higher result in public auditing. To overcome the challenges in public auditing, the author propose a hierarchical attribute based encryption based modular padding scheme. The method organizes the cloud data in hierarchical manner and each level of attributes has been stored in semantic manner. The semantic relations of the attributes are used to select the key parameter and the same is used to encrypt or decrypt the cloud data. The semantic ontology maintains the category of data attributes and for each data attribute the ontology refers a secret key. The key from the semantic ontology is selected and the same is used to perform verification. Again the encrypted data is performed with modular padding, which selects the random number and based on the value of random number, a padding of 1 or 0 is performed. The proposed approach improves the performance of public auditing and security in cloud environment.