An Enhanced Approach of Elliptic Curve Cryptosystem based Unicode Representation

Data encryption is an important issue and widely used in recent times to ensure security. Elliptic Curve Cryptography (ECC) is one of the most efficient techniques that are used in public key cryptography, because it is difficult for the adversary to solve the elliptic curve discrete logarithm problem to know the secret key that is used in encryption and decryption processes. ECC is more complex and thus it provides greater security and more efficient performance. This paper aims to propose an enhanced approach of elliptic curve cryptosystem based Unicode representation. The proposed technique transforms the text message into an affine point called Pm on the elliptic curve, over the finite field GF(p). Each character in the text message is represented by its Unicode value denoted by two digits and separated into two values. Then, the addition and doubling operations are performed on each value to obtain an affine point on elliptic curve. This transformation makes cryptosystem more secure and complicated to resist the adversaries. Further, the use of Unicode representation will provide better performance in this regard

A Novel Digital Signature based on Error Correcting Codes

A digital signature is a cryptographic primitive for ensuring the authenticity of digital documents. A valid digital signature allows checking that a message was created by a known sender (authentication), that the sender cannot deny having sent the message (nonrepudiation), and that the message was not altered in transit (integrity).The idea of constructing practical signatures based on error correcting codes was introduced by Courtois et al in [1]. The main goal is to make digital signature for which the security is based on decoding syndrome problem. In this paper, a new construction of digital signature is considered which is an extension of the error correcting code construction. The proposed method consists of reordering the message bits to get a decodable word. Then apply an efficient decoding algorithm to get signature

An Innovative Approach for Enhancing Cloud Data Security using Attribute based Encryption and ECC

Cloud computing is future for upcoming generations. Nowadays various companies are looking to use Cloud computing services, as it may benefit them in terms of price, reliability and unlimited storage capacity. Providing security and privacy protection for the cloud data is one of the most difficult task in recent days. One of the measures which customers can take care of is to encrypt their data before it is stored on the cloud. Recently, the attribute-based encryption (ABE) is a popular solution to achieve secure data transmission and storage in the cloud computing. In this paper, an efficient hybrid approach using attribute-based encryption scheme and ECC is proposed to enhance the security and privacy issues in cloud. Here, the proposed scheme is based on Cipher text-Policy Attribute Based Encryption (CP-ABE) without bilinear pairing operations. In this approach, the computation-intensive bilinear pairing operation is replaced by the scalar multiplication on elliptic curves. Experimental results show that the proposed scheme has good cryptographic properties, and high security level which depends in the difficulty to solve the discrete logarithm problem on elliptic curves (ECDLP)