S.W.Thakare, Prof.N.R.Chopde
User?s data may be stored in a cloud to take advantage of its scalability, accessibility, and economics. & it must be protected from untrusted cloud provider. Basically develop „Group Chat+? application for android mobile users. It is work on android, smartphone, PDA mobile users & also on laptop, desktop users virtually. It implements the idea of Android Cloud to Device Messaging securely. This application helps to sends data from servers to their applications on Android devices & Client to clients or /group of clients communication securely & vice-versa. The application provides a simple, lightweight mechanism on both server & clients. For security of users database AES Algorithms is implemented for encrypting as well as decrypting message through mobile application in cloud network. Symmetric Cryptographic Key is applied on sensitive data to be stored at cloud. For that, a key management scheme is proposed where encrypted key shares are stored in the cloud and automatically deleted based on passage of time or user activity. Also, Subscription to user data is maintained through regular re-generation of shares. Our application is able to resist the attacks from various fields over confidentiality, integrity, availability, and privacy. So that, SHA1 algorithm is implemented. It one way to secure hash value that implement in protection of all users password security throughout the network of mobile cloud.
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