This paper presents an ongoing work toward the proposal of the new concept of the attribute-
based cryptosystem. In SCN2010, Gagné, Narayan, and Safavi-Naini proposed attribute …

Privacy preserved outsourced data access control is a hard task under the control of
third–party storage server. To overcome obstacles in the third party based scenario …

Nowadays, fog computing provides computation, storage, and application services to end
users in the Internet of Things. One of the major concerns in fog computing systems is how …

Signcryption is a public key cryptosystem that achieves the functions of digital signature and
public key encryption simultaneously. It significantly reduces the cost of traditional signature …

The ever-growing number of Internet connected devices poses several cybersecurity risks.
Most of the exchanged data between the Internet of Things (IoT) devices are not adequately …

Cloud file storage systems are the current trend of enterprises and also of individual users.
Due to the malicious or unauthorized users, file sharing among the cloud users has become …

An Attribute-Based Signcryption is a natural extension of attribute-based encryption and
attribute-based signature where we have the message confidentiality and authenticity …

In this paper, we present an efficient revocable signcryption (CP-ABSC) with outsourced
unsigncryption scheme based on ciphertext-policy attribute based encryption (CP-ABE) to …

In this paper, we propose a novel constant-size threshold attribute-based signcryption
scheme for securely sharing data through public clouds. Our proposal has several …