Results 21 to 30 of about 876 (241)
Revocable Attribute-Based Signature for Blockchain-Based Healthcare System
IEEE Access, 2020 Blockchain-Based Healthcare System (HS-BC) is an electronic medical record (EMR) data-sharing system, which significantly facilitates the storage, access, and sharing of EMR data, and provides patients with timely and effective medical diagnosis and ...
Qianqian Su +3 more
doaj +1 more source
Attribute-based revocable collaborative access control scheme
Tongxin xuebao, 2021 To solve the dynamic update of access rights in attribute-based collaborative access control, a novel scheme was proposed with the revocation of attribute, user and collaborative policy.A formal definition and a security model were presented, the group ...
Changgen PENG +4 more
doaj +2 more sources
Revocable Attribute-Based Encryption Scheme With Efficient Deduplication for Ehealth Systems
IEEE Access, 2019 The deduplication based on attribute-based encryption can be well used in eHealth systems to save storage space and share medical records. However, the excessive computation costs of existing schemes lead to inefficient deduplication.
Hua Ma +4 more
doaj +1 more source
Attribute-Based Encryption with Granular Revocation
, 2017 Attribute-based encryption (ABE) enables an access control mechanism over encrypted data by specifying access policies over attributes associated with private keys or ciphertexts, which is a promising solution to protect data privacy in cloud storage services. As an encryption system that involves many data users whose attributes might change over time,
Hui Cui 0001 +3 more
openaire +3 more sources
Divergent Synthesis of Möbius and Hückel N‐Heterocycloarenes From a Common Macrocyclic Backbone
Angewandte Chemie, EarlyView.In the divergent synthesis of Möbius and Hückel N‐heterocycloarenes from a common macrocyclic precursor, the annulation reaction dictates topology: Scholl reaction gives Möbius topology, while InCl3‐mediated alkyne annulation gives Hückel topology. The Möbius N‐heterocycloarene is unevenly contorted as revealed by crystal structure, and the Hückel N ...
Han Chen +6 more
wiley +2 more sources
Ciphertext policy attribute-based encryption scheme supporting direct revocation
Tongxin xuebao, 2016 In order to support fine-grained attribute revocation in direct revocation mode an attribute-based encryption scheme with efficient revocation was proposed.The model of ABE supporting attribute revocation was given,and a con-crete scheme was constructed ...
Xi-xi YAN, Hui MENG
doaj +2 more sources
Outsourcing Attributed-Based Ranked Searchable Encryption With Revocation for Cloud Storage
IEEE Access, 2020 With the rapid growth of the cloud computing and strengthening of security requirements, encrypted cloud services are of importance and benefit. For the huge ciphertext data stored in the cloud, many secure searchable methods based on cryptography with ...
Leyou Zhang, Jian Su, Yi Mu
doaj +1 more source
Iterative Synthesis of Pyrene–Coronene Molecular Graphene Nanoribbons
Angewandte Chemie, EarlyView.An iterative approach delivers a new family of undoped, cove‐edged graphene nanoribbons with lengths up to 9.1 nm that exhibit both molar absorptivity and fluorescence brightness values on the order of 105 M−1 cm−1 and an intrinsic charge‐carrier mobility of 475 ± 32 cm2 V−1 s−1.
Miguel A. Medel +6 more
wiley +2 more sources
Attribute-based encryption scheme with efficient revocation in data outsourcing systems
Tongxin xuebao, 2015 In order to support fine-grained attribute revocation in data outsourcing systems,an attribute-based encryption scheme with efficient revocation in indirect revocation model was proposed.The model of ABE supporting attribute revocation was given,and a ...
Xi-xi YAN, Yong-li TANG
doaj +2 more sources
Two-Factor Data Access Control With Efficient Revocation for Multi-Authority Cloud Storage Systems
IEEE Access, 2017 Attribute-based encryption, especially for ciphertext-policy attribute-based encryption, can fulfill the functionality of fine-grained access control in cloud storage systems. Since users' attributes may be issued by multiple attribute authorities, multi-
Xiaoyu Li +4 more
doaj +1 more source