Published Paper Details:

In the cloud-assisted internet of things, it presents a flexible privacy-preserving data sharing (FPDS) approach (IoT). An IoT user can encrypt data and send it to a receiver using the FPDS scheme, which uses identity-based encryption. A data owner can use identity based encryption (IBE) to restrict access to his data by encrypting it with the intended recipient's public identification address. As a result, only the authorized user with his own secret key may access the outsourced data. In particular, the data owner can create an access policy to generate a delegation credential, which the cloud can use to turn any encrypted data that meets the access policy into cypher text accessible by a new receiver. The purpose of the FPDS scheme is to secure under the IBE scheme's security. Informally, unless the associated private keys are accessible, an attacker cannot identify the (original or converted) cypher texts of two equal-length messages. As a result, the confidentiality of data that is outsourced is effectively secured. The FPDS system accomplishes delegation security while maintaining security. Informally, an attacker possessing delegation credentials and private keys can collude with customer service representatives and data users. The attacker cannot convert any cypher text unless it knows the associated delegation credential or the private key to the cypher text, according to the FPDS scheme. Based on the foregoing studies, the suggested FPDS method provides an efficient data sharing conversion mechanism. Without conducting costly decryption and encryption operations, a data owner can encrypt his data with numerous keywords and then share it with a data consumer by establishing an access policy.