ABSTRACT:
Cloud computing is an emerging
computing paradigm that enables users to store their data into a cloud server
to enjoy scalable and on-demand services. Nevertheless, it also brings many
security issues since cloud service providers (CSPs) are not in the same
trusted domain as users. To protect data privacy against untrusted CSPs,
existing solutions apply cryptographic methods (e.g., encryption mechanisms)
and provide decryption keys only to authorized users. However, sharing cloud
data among authorized users at a fine-grained level is still a challenging
issue, especially when dealing with dynamic user groups. In this paper, we
propose a secure and efficient fine-grained access control and data sharing
scheme for dynamic user groups by (1) defining and enforcing access policies
based on the attributes of the data; (2) permitting key generation center (KGC)
to efficiently update user credentials for dynamic user groups; and (3)
allowing some expensive computation tasks to be performed by untrusted CSPs
without requiring any delegation key. Specifically, we first design an
efficient revocable attribute based encryption (RABE) scheme with the property
of ciphertext delegation by exploiting and uniquely combining techniques of
identity-based encryption (IBE), Attribute-based Encryption (ABE), subset-cover
framework and ciphertext encoding mechanism. We then present a fine-grained
access control and data sharing system for on-demand services with dynamic user
groups in cloud. The experimental data shows that our proposed scheme is more
efficient and scalable than the state-of-the-art solution.
SYSTEM REQUIREMENTS:
HARDWARE REQUIREMENTS:
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System : Pentium Dual Core.
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Hard Disk : 120 GB.
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Monitor : 15’’ LED
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Input Devices : Keyboard, Mouse
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Ram : 1 GB
SOFTWARE REQUIREMENTS:
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Operating system : Windows 7.
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Coding Language : JAVA/J2EE
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Tool : Netbeans 7.2.1
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Database : MYSQL
REFERENCE:
Shengmin Xu, Guomin
Yang_, Senior Member, IEEE, Yi Mu, Senior Member, IEEE, and Robert H. Deng
Fellow, IEEE, “Secure Fine-Grained Access Control and Data Sharing for Dynamic
Groups in Cloud”, IEEE Transactions on Information Forensics and Security,
2018.