Secure Digital Certificate-Based Data Access Control Scheme in Blockchain

Blockchain Based Access Control

Access Control systems are used in computer security to regulate the access to critical or valuable resources. The rights of subjects to access such resources are typically expressed through access control policies, which are evaluated at access request time against the current access context. This paper proposes a new approach based on blockchain technology to publish the policies expressing t...

A Forward-Secure Certificate-Based Signature Scheme

Provably Secure Certificate-based Signature Scheme for Ad Hoc Networks

Certificate-based cryptography proposed by Gentry in Eurocrypt 2003 combines the advantages of traditional public key cryptography (PKI) and identitybased cryptography, and removes the certificate management problem and the private key escrow security concern. Based on computational Diffie-Hellman assumption, a certificate-based signature scheme is constructed to insure the security of communic...

Provably secure certificate-based key-insulated signature scheme

Certificate-based signature computation is often performed on insecure devices where the signature key is easy to be exposed. To reduce the influence of key exposure, we introduce key-insulated mechanism into certificate-based cryptography and formalize the notion and security model of the certificate-based key-insulated signature scheme. We then present a certificate-based key-insulated signat...

Certificate-Based Secure Three-Party Signcryption Scheme with Low Costs

A signcryption scheme combining public key encryption and digital signatures can simultaneously satisfy the security requirements of confidentiality, integrity, authenticity and non-repudiation. In a three-party communication environment, a message signcrypted by one party might have to be securely delivered to the other two and they usually independently decrypt the ciphertext and verify recov...