The document discusses an identity-based proxy-oriented data uploading and remote data integrity checking model called IDPUIC. It proposes allowing clients to delegate proxies to upload and process data when clients cannot directly access public cloud servers. It also addresses remote data integrity checking, which allows clients to check if their outsourced data remains intact without downloading the whole data. The document then provides a formal definition, system model, and security model for IDPUIC before describing an efficient and flexible IDPUIC protocol based on bilinear pairings that is provably secure based on the computational Diffie-Hellman problem.

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Identity-Based Proxy-Oriented Data Uploading and Remote Data Integrity Checking in
Public Cloud
Abstract
More and more clients would like to store their data to PCS (public cloud servers) along
with the rapid development of cloud computing. New security problems have to be solved in
order to help more clients process their data in public cloud. When the client is restricted to
access PCS, he will delegate its proxy to process his data and upload them. On the other hand,
remote data integrity checking is also an important security problem in public cloud storage. It
makes the clients check whether their outsourced data is kept intact without downloading the
whole data. From the security problems, we propose a novel proxy-oriented data uploading and
remote data integrity checking model in identity-based public key cryptography: IDPUIC
(identity-based proxy-oriented data uploading and remote data integrity checking in public
cloud). We give the formal definition, system model and security model. Then, a concrete ID-
PUIC protocol is designed by using the bilinear pairings. The proposed ID-PUIC protocol is
provably secure based on the hardness of CDH (computational Diffie-Hellman) problem. Our
ID-PUIC protocol is also efficient and flexible. Based on the original client’s authorization, the
proposed ID-PUIC protocol can realize private remote data integrity checking, delegated remote
data

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System Specification
System Requirements:
Hardware Requirements:
• System : Pentium IV 2.4 GHz.
• Hard Disk : 40 GB.
• Floppy Drive : 1.44 Mb.
• Monitor : 15 VGA Colour.
• Mouse : Logitech.
• Ram : 512 Mb.
Software Requirements:
• Operating system : - Windows 7. 32 bit
• Coding Language : C#.net 4.0
• Data Base : SQL Server 2008

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