Challenge-Response Enabled Identity Based Encryption in Cloud

Abstract

Cloud computing provides enormous applications to the people in the real world. One of the most commonly used applications is cloud storage. Most of the people uses cloud storage space to reduces the local system overhead and make availability of data on time. The moving of data from user to cloud will raise the security and confidentiality concerns of data. To safeguard the data confidentiality many of the encryptions technologies are used. To achieve security in cloud computing, this paper proposed an Identity Based Encryption (IBE) with access time slot of each and every user. It facilitates the data encrypted by the user identification and additionally a particular access time slot will be mapped with that user ID. For enhancing the security, the encryption key is divided into two parts, one is with the data owner and another part is with the cloud. The data integrity is verified by the integrity auditing method with the challenge-response game. The proposed work ensures the data confidentiality, user verification and effective data integrity checking with low computation cost.