Abstract:In this paper, we consider 'secure attribute based system with short ciphertext' is a tool for implementing fine-grained access control over encrypted data, and is conceptually similar to traditional access control methods such as Role-Based Access Control. However, current 'secure attribute based system with short ciphertext' schemes suffer from the issue of having long decryption keys, in which the size is linear to and dependent on the number of attributes.Ciphertext-Policy ABE (CP-ABE) provides a scalable way of encrypting data such that the encryptor defines the attribute set that the decryptor needs to possess in order to decrypt the ciphertext. We propose a novel 'secure attribute based system with short ciphertext' scheme with constantsize decryption keys independent of the number of attributes. We found that the size can be as small as 672 bits.

The work presented in this paper was part of investigation in assisting echolalia attacked autism people with the help of mobile application. One of the biggest challenges that the society faces is ensuring that autistic children communicate and interact socially, so that they may develop their skills and consequently, contribute to the society. The objective of this study is to design a system that will help autistic children to improve their social interaction skills. The system will be run on the Android platform, a popular platform where a great number of smart phone device applications are run. The application will be designed based on the characteristics of echolalia attacked people with autism.

Abstract-The technique of k-anonymization has been proposed in the literature as an alternative way to release public information, while ensuring both data privacy and data confidentiality.