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EXISTING SYSTEM

PROPOSED SYSTEM

   EXISTING CONCEPT:-           

Previous auditing protocols did not onside this critical issue and any exposure of the client’s secret auditing key would make most of the existing auditing protocols unable to work correctly.

 All existing protocols focus on the faults or

 dishonesty of the cloud, they have                  overlooked the possible weak sense of security and/or low security settings at the

client

PROPOSED CONCEPT:-

In this paper, we focus on how to reduce the damage of the client’s key exposure in cloud storage auditing.

Many cloud storage auditing protocols have been proposed based on this technique. The privacy protection of data is also an important aspect of cloud storage auditing.

EXISTING ALGORITHM:-

Lazy Update Algorithm

PROPOSED ALGORITHM:-

Key Update  algorithm

ALGORITHM DEFNITION:-

Sometime, a client prefers to update his secret key after multiple time periods. For example, the client may be very busy from time period i to time period and has no time to update his secret keys during these periods. Our protocol supports lazy update. The client can update his secret key only at the end of time period.

ALGORITHM DEFNITION:-

The key update algorithm is a probabilistic algorithm which takes as input the public key the current period j and client’s secret key and generates a new secret key for the next period. This algorithm is run by the client.

The proof verifying algorithm is a deterministic algorithm which takes as input the public key, a time period, a challenge Chaland a proof, and returns True or False. This algorithm is run by the client.

   DRAWBACKS:-

It is very slow and high traffic

Time Delay

ADVANTAGES:-

Achieve key-exposure resistance in cloud storage auditing

Never take time delay