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With the growth of cloud computing and the popularity of electronic health records (EHR), more and more patients and hospitals are uploading EHR to the cloud for storage, retrieval and organization. Due to the privacy of EHR, cloud‐based EHR ...

This article proposes a lightweight CP‐ABE scheme for EHR over cloud based on blockchain and secure multi‐party computation (LCBS). We design a blockchain suitable for EHR systems to record the users' key information, assisting multiple entities to verify ...

Cloud-assisted Internet of Things (CIoT) enhances data accessibility and operational efficiency but encounters various security and privacy challenges. Today, CIoT applications generate large amounts of data in a multi-client accessible environment ...

Ciphertext-Policy Attribute-Based Encryption (CP-ABE) is a cryptographic primitive that provides confidentiality and fine-grained access control for data sharing in untrusted cloud environments. It allows data owners to set access policies based on ...

Mobile cloud computing (MCC) enhances mobile device capabilities with cloud-based resources, allowing mobile users to outsource more data to the cloud to enjoy services of interest. It uses ciphertext policy attribute-based encryption (CP-ABE) to ...

As cloud computing technology advances, the demand for data sharing through cloud platforms is increasing. However, existing approaches suffer from limitations in granularity and flexibility. Ciphertext Policy Attribute-Based Encryption (CP-ABE) ...

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• A hierarchical access control method based on blockchain and multiple authorities for CP-ABE is proposed.
• The utilization of blockchain technology ensures the secure and reliable documentation of the access control procedures.
• The ...

In the IoT environment, traditional access control mechanisms suffer from overuse of user privileges and coarse access granularity, while failing to verify user requests in real time. To address these challenges, this paper introduces the User Behavior-...

The integration of the Internet of Things into patient monitoring devices has garnered significant attention, especially in response to the COVID-19 pandemic’s increased focus on telecare services. However, Internet of Medical Things (IoMT) ...

Data exchange among value chain partners offers a competitive advantage, but it also exposes sensitive data to increasing risks of compromise. To protect this data, securing it during storage and transmission is essential, allowing only the data ...

• Industrial data confidentiality is crucial to minimize damage from data breaches.
• Robust end-to-end confidentiality for industrial data with CP-ABE.
• Flexible and scalable access control with policy updates.
• The proposal is ...

The Internet of Things (IoTs) is based on physical sensors that collect data and transfer it to remote cloud computing platforms for processing and storage. Healthcare applications are one of the very promising areas where IoTs are expected to ...

Ciphertext policy attribute-based encryption (CP-ABE) is a potential solution to security sharing issues since it offers one-to-many encryption and fine-grained access control. To prevent users from disclosing their access permissions, traceable ...

• An efficient tracking mechanism is designed for key-associated users based on white-box tracking to avoid the privilege abuse problem.
• An auditable contract based on blockchain is employed to prevent user denial.
• An authority ...

Electronic Health Records (EHRs) play a crucial role in improving healthcare efficiency and quality through data sharing between healthcare institutions and patients. The sharing of EHRs necessitates collaboration, especially in emergency cases ...

Implementing a cloud-based data warehouse to store sensitive or critical strategic data presents challenges primarily related to the security of the stored information and the exchange of OLAP queries between the cloud server and users. Although ...

Ciphertext-policy attribute-based encryption (CP-ABE) offers a promising approach to enforce fine-grained access control over outsourced data through cryptographic functions. It enables data owners to formulate access policies by specifying attribute ...

With the advent of the digital age, the generation and storage of health data is growing exponentially. However, the effective sharing of health data has always been a problem of concern. Traditional health data sharing methods have many problems, ...

Nowadays, the integration of blockchain technology with Ciphertext-Policy Attribute-Based Encryption (CP-ABE) has drawn the researcher attention because it can provide key security auditing and transaction traceability in the context of data ...

In order to prevent and control the risks of electricity bill collection fraud, money laundering and payment arrears, and improve the lean management level of customer service, in response to the difficulties in sharing large amounts of traditional ...

Metaverse is an immersive, hyperspace virtual reality space. Due to its characteristics of hyperspace and immersive realism, metaverse has a bright future, but ubiquitous user analysis and calculation make it difficult to achieve one-to-multiple ...

• We propose an outsourced CP-ABE scheme with cryptographic reverse firewall protection.
• We propose an black-box tracing CP-ABE scheme with cryptographic reverse firewall protection.
• The scheme is high efficient, resistant to ...

The personal health record (PHR) is an important part of the smart health system. The medical profession can provide medical services to patients in time by accessing PHRs stored in the cloud. However, PHR suffers from unauthorized access and ...

With the popularization of internet of vehicles (IoV) applications, security issues are becoming increasingly prominent. IoV is vulnerable to various attacks, which may endanger users’ privacy, functionality, property and even life. The security ...

Implementing a trust and secure immunity or vaccine passport verification system is now crucial for many countries. The system typically aims to enable the secure access control and verification of vaccination records which will be used by trusted ...