Secure Group Communication to PreventUnauthorized Messages in DTN Based MobileAd Hoc Networks

Abstract

To establish a communication among wireless devices and to retrieve the data securely Disruption tolerant network (DTN) is introduced. For maintaining the data confidential many cryptographic solutions are used. The issues in accessing the information is solved by the algorithm called Ciphertext Policy-Attribute Based Encryption. This has enormous challenge in providing security for the information. In decentralized DTN, CP-ABE is implemented with multiple key authorities that handle the attributes individually. Two party computation protocols are introduced in CP-ABE to protect the authority’s interest in knowing the private keys created by others. The fine-drawn secret reversals are made for each and every feature set. Any monotone access structure can be used for creating the access policy in CP-ABE. In this the key authorities may be adjusted or not entirely believed. To maintain the trust partially the assumption is made such that the central authority does not conspiracy with local authority. To improve the trust we proposed an improved CP-ABE, in this we determine the trust of each user node in a network by estimating the trust of every node and updates the trust, so the user can have their trust in authority that generates the key for confidential data. By including the trust in CP-ABE, the users can trust the key authority for accessing the information securely. The privacy of the sending data and the data which are stored in storage node are maintained confidential by using the proposed system. Thus the proposed system has high degree of trust in the nodes.