KeyD: Secure Key-Deduplication with Identity-Based Broadcast Encryption
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This paper proposes a novel client-side deduplication protocol called KeyD that utilizes identity-based broadcast encryption to manage convergent keys without requiring an independent key management server. KeyD allows users to interact only with the cloud service provider during data upload and download. Security analysis shows that KeyD ensures data confidentiality, convergent key security, and ownership privacy. Performance analysis indicates KeyD achieves a better tradeoff among storage cost, communication overhead, and computation overhead compared to other schemes.
KeyD: Secure Key-Deduplication with Identity-Based Broadcast Encryption
- 1. KeyD: Secure Key-Deduplication with Identity-Based Broadcast Encryption ABSTRACT: Deduplication, which can save storage cost by enabling us to store only one copy of identical data, becomes unprecedentedly significant with the dramatic increase in data stored in the cloud. For the purpose of ensuring data confidentiality, they are usually encrypted before outsourced. Traditional encryption will inevitably result in multiple different ciphertexts produced from the same plaintext by different users’ secret keys, which hinders data deduplication. Convergent encryption makes deduplication possible since it naturally encrypts the same plaintexts into the same ciphertexts. One attendant problem is how to reliably and effectively manage a huge number of convergent keys. Several deduplication schemes have been proposed to deal with the convergent key management problem. However, they either need to introduce key management servers or require interaction between data owners. In this paper, we design a novel client- side deduplication protocol named KeyD without such an independent key management server by utilizing the identity-based broadcast encryption (IBBE) technique. Users only interact with the cloud service provider (CSP) during the process of data upload and download. Security analysis demonstrates that KeyD ensures data confidentiality and convergent key security, and well protects the ownership privacy simultaneously. A thorough and detailed performance comparison shows that our scheme makes a better tradeoff among the storage cost, communication and computation overhead.
- 2. SYSTEM REQUIREMENTS: HARDWARE REQUIREMENTS: System : Pentium Dual Core. Hard Disk : 120 GB. Monitor : 15’’ LED Input Devices : Keyboard, Mouse Ram : 1 GB SOFTWARE REQUIREMENTS: Operating system : Windows 7. Coding Language : JAVA. Tool : Netbeans 7.2.1 Database : MYSQL REFERENCE: Ling Liu, Yuqing Zhang and Xuejun Li, “KeyD: Secure Key-Deduplication with Identity-Based Broadcast Encryption”, IEEE Transactions on Cloud Computing, 2019.