An Improved Encryption and Signature Verification ECC Scheme for Cloud Computing

Ensuring the security and efficient authentication of any information is a prime concern for a cryptographic technique. In cloud model, since data is outsourced over untrusted third party without any physical possession of that, increase the concern regarding the cloud data security. Public key cryptography technique in cloud system is useful only if there is proper authentication of transformation of public key to authenticated user only. On the other hand, ECC technique compared to this provides different ways of ECC cryptographic key management, encryption, decryption, and digital signature and its verification. The advantage of ECC over public key scheme is that, it provides the same security level for a smaller key size compared to public key scheme, thus, reducing the process time of any cryptographic operation over the data in its communication between different cloud communicating parties. In this paper, we present a new framework for cloud system which has a different way of encryption/ decryption using ECC over finite field and improve signature and verification scheme. The result shows that communication cost is less compared to other scheme and improved speedup for signature and verification.