A certificateless signcryption with proxy re-encryption for practical access control in cloud-based reliable smart grid

Cloud computing has proven to be applicable in smart grid systems with the help of the cloud-based Internet of things (IoT) technology. In this concept, IoT is deployed as a front-end enabling the acquisition of smart grid-related data and its outsourcing to the cloud for data storage purposes. It is obvious that data storage is a pertinent service in cloud computing. However, its wide adoption is hindered by the concern of having a secure access to data without a breach on confidentiality and authentication. To address this problem, we propose a novel data access control scheme that simultaneously accomplishes confidentiality and authentication for cloud-based smart grid systems. Our scheme can enable the storing of encrypted smart grid-related data in the cloud. When a user prefers to access the data, the data owner issues a delegation command to the cloud for data re-encryption. The cloud is unable to acquire any plaintext information on the data. Only authorized users are capable of decrypting the data. Moreover, the integrity and authentication of data can only be verified by the authorized user. We obtain the data access control scheme by proposing a pairing free certificateless signcryption with proxy re-encryption (CLS-PRE) scheme. We prove that our CLS-PRE scheme has indistinguishability against adaptive chosen ciphertext attack under the gap Diffie–Hellman problem and existential unforgeability against adaptive chosen message attack under elliptic curve discrete logarithm problem in the random oracle model.

     

Certificateless deniably authenticated encryption and its application to e-voting system

Telecommunication Systems - The concept of deniably authenticated encryption (DAE) is presently significant in cryptography due to its security properties and wide range of application. It achieves...     

Heterogeneous signcryption with proxy re-encryption and its application in EHR systems

Electronic health record (EHR) systems provide the platform that enables digital documentation of patients health information. Practically, EHR systems aid in delivering quality medical healthcare and limiting medical errors. However, EHR systems are associated with known technical and security challenges such as interoperability, confidentiality, authentication, auditability, and access control. To overcome these challenges, we first propose a new heterogeneous signcryption with proxy re-encryption (HSC-PRE) scheme. Secondly, via an example design, we demonstrate how our scheme can be utilized to achieve a secure, interoperable, auditable and accessible EHR system using blockchain technology. The blockchain technology is required to assure interoperability and auditability while the HSC-PRE assures confidentiality, authentication and access control. Via comprehensive security analysis (in random oracle model (ROM)), we affirm that the HSC-PRE scheme is secure. Besides, it shows up efficient against other recent related schemes.