KEY AGGREGATE CRYPTOSYSTEM & INTRUSION DETECTION FOR DATA SHARING IN CLOUD

Abstract

A cryptosystem is a system that provides encryption and decryption schemes for sharing data. An intrusion detection system monitors the security breaches while sharing of data. Cryptosystem integrated with Intrusion detection system makes a leakage resilient system. New public key cryptosystems which produces constant size cipher texts such that decryption rights for any set of cipher text can be delegated efficiently. In this article we describe a cryptographic technique in which of secret keys are combined to make them compact as a single key. Here, power of all keys being aggregated. In other words the key owner will share an aggregate key with the second party on demand. The receivers will able to decrypt the files on cipher text choices but other encrypted files outside the cipher text set remains confidential. To make system leakage resilient, provision for intrusion detection and prevention is also made for secure data sharing between participants.