scholarly journals A Lightweight Fine-Grained Searchable Encryption Scheme in Fog-Based Healthcare IoT Networks

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Hui Li ◽  
Tao Jing
Keyword(s):  
Access Control ◽  
Healthcare System ◽  
Limited Resource ◽  
Searchable Encryption ◽  
Security Requirements ◽  
Communication Overhead ◽  
Encryption Scheme ◽  
Fine Grained ◽  
Smart Healthcare ◽  
Cloud Framework

For a smart healthcare system, a cloud based paradigm with numerous user terminals is to support and improve more reliable, convenient, and intelligent services. Considering the resource limitation of terminals and communication overhead in cloud paradigm, we propose a hybrid IoT-Fog-Cloud framework. In this framework, we deploy a geo-distributed fog layer at the edge of networks. The fogs can provide the local storage, sufficient processing power, and appropriate network functions. For the fog-based healthcare system, data confidentiality, access control, and secure searching over ciphertext are the key issues in sensitive data. Furthermore, how to adjust the storage and computing requirements to meet the limited resource is also a great challenge for data management. To address these, we design a lightweight keyword searchable encryption scheme with fine-grained access control for our proposed healthcare related IoT-Fog-Cloud framework. Through our design, the users can achieve a fast and efficient service by delegating a majority part of the workloads and storage requirements to fogs and the cloud without extra privacy leakage. We prove our scheme satisfies the security requirements and demonstrate the excellent efficiency through experimental evaluation.

An Attribute-Based Searchable Encryption Scheme for Non-Monotonic Access Structure

2020 ◽  
pp. 263-283 ◽  
Author(s):  
Mamta ­ ◽  
Brij B. Gupta
Keyword(s):  
Access Control ◽  
Searchable Encryption ◽  
Access Structure ◽  
Encryption Scheme ◽  
Security Model ◽  
Secret Key ◽  
Fine Grained ◽  
Diffie Hellman ◽  
Attribute Based Encryption ◽  
Encryption Schemes

Attribute based encryption (ABE) is a widely used technique with tremendous application in cloud computing because it provides fine-grained access control capability. Owing to this property, it is emerging as a popular technique in the area of searchable encryption where the fine-grained access control is used to determine the search capabilities of a user. But, in the searchable encryption schemes developed using ABE it is assumed that the access structure is monotonic which contains AND, OR and threshold gates. Many ABE schemes have been developed for non-monotonic access structure which supports NOT gate, but this is the first attempt to develop a searchable encryption scheme for the same. The proposed scheme results in fast search and generates secret key and search token of constant size and also the ciphertext components are quite fewer than the number of attributes involved. The proposed scheme is proven secure against chosen keyword attack (CKA) in selective security model under Decisional Bilinear Diffie-Hellman (DBDH) assumption.

scholarly journals BFR-SE: A Blockchain-Based Fair and Reliable Searchable Encryption Scheme for IoT with Fine-Grained Access Control in Cloud Environment

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Hongmin Gao ◽  
Shoushan Luo ◽  
Zhaofeng Ma ◽  
Xiaodan Yan ◽  
Yanping Xu
Keyword(s):  
Access Control ◽  
Service Providers ◽  
Auxiliary Information ◽  
Bloom Filter ◽  
Searchable Encryption ◽  
Security And Privacy ◽  
Encryption Scheme ◽  
Fine Grained ◽  
Data User ◽  
Iot Devices

Due to capacity limitations, large amounts of data generated by IoT devices are often stored on cloud servers. These data are usually encrypted to prevent the disclosure, which significantly affects the availability of this data. Searchable encryption (SE) allows a party to store his data created by his IoT devices or mobile in encryption on the cloud server to protect his privacy while retaining his ability to search for data. However, the general SE techniques are all pay-then-use. The searchable encryption service providers (SESP) are considered curious but honest, making it unfair and unreliable. To address these problems, we combined ciphertext-policy attribute-based encryption, Bloom filter, and blockchain to propose a blockchain-based fair and reliable searchable encryption scheme (BFR-SE) in this paper. In BFR-SE, we constructed an attribute-based searchable encryption model that can provide fine-grained access control. The data owner stores the indices on SESP and stores some additional auxiliary information on the blockchain. After a data user initiates a request, SESP must return the correct and integral search results before the deadline. Otherwise, the data user can send an arbitration request, and the blockchain will make a ruling. The blockchain will only perform arbitrations based on auxiliary information when disputes arise, saving the computing resources on-chain. We analyzed the security and privacy of BFR-SE and simulated our scheme on the EOS blockchain, which proves that BFR-SE is feasible. Meanwhile, we provided a thorough analysis of storage and computing overhead, proving that BFR-SE is practical and has good performance.

scholarly journals Lightweight Fine-Grained Access Control for Wireless Body Area Networks

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1088 ◽  
Author(s):  
Mohammad Ali ◽  
Mohammad-Reza Sadeghi ◽  
Ximeng Liu
Keyword(s):  
Access Control ◽  
Wireless Body Area Network ◽  
Control Policy ◽  
Cloud Service ◽  
Communication Overhead ◽  
Area Network ◽  
Sensitive Information ◽  
Health Providers ◽  
Body Area ◽  
Fine Grained

Wireless Body Area Network (WBAN) is a highly promising technology enabling health providers to remotely monitor vital parameters of patients via tiny wearable and implantable sensors. In a WBAN, medical data is collected by several tiny sensors and usually transmitted to a server-side (e.g., a cloud service provider) for long-term storage and online/offline processing. However, as the health data includes several sensitive information, providing confidentiality and fine-grained access control is necessary to preserve the privacy of patients. In this paper, we design an attribute-based encryption (ABE) scheme with lightweight encryption and decryption mechanisms. Our scheme enables tiny sensors to encrypt the collected data under an access control policy by performing very few computational operations. Also, the computational overhead on the users in the decryption phase is lightweight, and most of the operations are performed by the cloud server. In comparison with some excellent ABE schemes, our encryption mechanism is more than 100 times faster, and the communication overhead in our scheme decreases significantly. We provide the security definition for the new primitive and prove its security in the standard model and under the hardness assumption of the decisional bilinear Diffie-Hellman (DBDH) problem.

scholarly journals Hybrid Secure Model for Securing Data in The Cloud Computing System by Combining RSA, AES and CP-ABE: نموذج هجين آمن لحماية البيانات في الحوسبة السحابية بدمج RSA وAES وCP-ABE

2021 ◽  
Vol 5 (4) ◽  
pp. 80-59
Author(s):  
Zakria Mahrousa, Mahmoud Rahhal, Nairouz Alzin Zakria Mahrousa, Mahmoud Rahhal, Nairouz Alzin
Keyword(s):  
Health Care ◽  
Cloud Computing ◽  
Access Control ◽  
Healthcare System ◽  
Service Providers ◽  
Security Requirements ◽  
Security And Privacy ◽  
Rsa Algorithm ◽  
Aes Algorithm ◽  
Cloud Computing System

The cloud healthcare system represents an important application for cloud computing, as it uses the cloud for the operations of storing patient medical data and sharing it between health care service providers and patients, making the security and privacy of e-health system data the main concern of researchers. This paper presents an integrated secure model for the healthcare system in cloud computing that achieves the security and confidentiality of data transferred through cloud computing, by combining the two algorithms AES and RSA with the access control algorithm CP-ABE in order to use the advantages of each of them, where the encryption process is done by a proposed algorithm which is based on the RSA algorithm, the XOR parameter, and the AES algorithm; the secrecy of the AES algorithm has been increased by generating a dynamic key, and the confidentiality of this key has been secured with two encryption levels, the first level using the CP-ABE algorithm and the second level using the RSA algorithm. The proposed model is characterized by meeting the requirements of access control, authentication, and verification for both the transmitter and the receiver, and the results of the application of this model proved its ability to meet the security requirements of the health care system in cloud computing with the lowest possible implementation time, as the execution times were at the transmitter's end (43.2, 43.83, 45.11, 48. 23, 50.77, 52.16, 57.95, 63.2, and 63.35)ms for variable file sizes (37, 50, 100, 150, 200, 256, 512, 1000, and 1024)KB, respectively. The results also showed its superiority in terms of security requirements in cloud computing and the necessary implementation times on studied reference models.

scholarly journals ECC-Based Lightweight Authentication And Access Control Scheme For IoT E-Healthcare

2021 ◽  
Author(s):  
Hailong Yao ◽  
Qiao Yan ◽  
Xingbing Fu ◽  
Zhibin Zhang ◽  
Caihui Lan
Keyword(s):  
Access Control ◽  
Healthcare System ◽  
Secure Communication ◽  
Wireless Body Area Network ◽  
Security Analysis ◽  
Communication Overhead ◽  
Single Server ◽  
Area Network ◽  
Control Scheme ◽  
Multi Server

Abstract The E-healthcare system has a complex architecture, diverse business types, and sensitive data security. To meet the secure communication and access control requirements in the user-medical server, user-patient, patient-medical server and other scenarios in the E-healthcare system, secure and efficient authenticated key agreement and access authorization scheme need to be studied. However, the existing multi-server solutions do not consider the authentication requirements of the Wireless Body Area Network(WBAN), and are not suitable for user-patient, patient-medical server scenarios; most of the existing WBAN authentication scheme are single-server type, which are difficult to meet the requirements of multi-server applications; the study of user-patient real-time scenarios has not received due attention. This work first reveals the structural flaws and security vulnerabilities of the existing typical schemes, and then proposes an authentication and access control architecture suitable for multiple scenarios of the E-healthcare system with separate management and business, and designs a novel ECC-based multi-factor remote authentication and access control scheme for E-healthcare using physically uncloneable function (PUF) and hash. Security analysis and efficiency analysis show that the new scheme has achieved improved functionality and higher security while maintaining low computational and communication overhead.

scholarly journals Speech Encryption Scheme Based on Ciphertext Policy Hierarchical Attribute in Cloud Storage

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Qiuyu Zhang ◽  
Zhenyu Zhao ◽  
Minrui Fu
Keyword(s):  
Access Control ◽  
Cloud Storage ◽  
Random Oracle Model ◽  
Access Structure ◽  
Encryption Scheme ◽  
Hierarchical Processing ◽  
Fine Grained ◽  
Speech Data ◽  
Speech Encryption ◽  
Ciphertext Policy

In order to ensure the confidentiality and secure sharing of speech data, and to solve the problems of slow deployment of attribute encryption systems and fine-grained access control in cloud storage, a speech encryption scheme based on ciphertext policy hierarchical attributes was proposed. First, perform hierarchical processing of the attributes of the speech data to reflect the hierarchical structure and integrate the hierarchical access structure into a single-access structure. Second, use the attribute fast encryption framework to construct the attribute encryption scheme of the speech data, and use the integrated access to the speech data; thus, the structure is encrypted and uploaded to the cloud for storage and sharing. Finally, use the hardness of decisional bilinear Diffie–Hellman (DBDH) assumption to prove that the proposed scheme is secure in the random oracle model. The theoretical security analysis and experimental results show that the proposed scheme can achieve efficient and fine-grained access control and is secure and extensible.

A Smart Contract Based Access Control Framework for Cloud Smart Healthcare System

2020 ◽  
pp. 1-1
Author(s):  
Akanksha Saini ◽  
Qingyi Zhu ◽  
Navneet Singh ◽  
Yong Xiang ◽  
Longxiang Gao ◽  
...  
Keyword(s):  
Access Control ◽  
Healthcare System ◽  
Smart Healthcare ◽  
Smart Contract ◽  
Control Framework
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