Fully homomorphic encryption enables arbitrary computation on encrypted data without decrypting the data. Here it is studied in the context of quantum information processing. Based on universal quantum circuit, we present a quantum fully homomorphic encryption (QFHE) scheme, which permits arbitrary quantum transformation on an encrypted data. The QFHE scheme is proved to be perfectly secure. In...

Cloud Computing is developed and used by all enterprise in world to outsource their data. To maintain confidentiality of shared data against entrusted party encryption of data is important. Many scheme is introduced to achieve security of outsource data in cloud .But they fails to achieve data integrity in cloud. Sometimes entrusted cloud service provider modifies or deletes the data without ge...

Cloud computing is a popular distributed network and utility model based technology. Since in cloud the data is outsourced to third parties, the protection of confidentiality and privacy of user data becomes important. Different methods for securing the data in cloud have been proposed by researchers including but not limited to Oblivious RAM, Searchable Encryption, Functional Encryption, Homom...