Privacy-preserving authentication based on group signature for VANETs

2013 ◽  
Author(s):  
Xiaoyan Zhu ◽  
Shunrong Jiang ◽  
Liangmin Wang ◽  
Hui Li ◽  
Weidong Zhang ◽  
...  
Keyword(s):  
Privacy Preserving ◽  
Group Signature

scholarly journals Privacy-Preserving Scheme in the Blockchain Based on Group Signature with Multiple Managers

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Fei Tang ◽  
Zhuo Feng ◽  
Qianhong Gong ◽  
Yonghong Huang ◽  
Dong Huang
Keyword(s):  
Single Point ◽  
Privacy Preserving ◽  
Bilinear Pairing ◽  
Group Signature ◽  
Key Generation ◽  
Provable Data Possession ◽  
Key Escrow ◽  
Authentication Mechanism ◽  
Traditional Scheme

Group signature can provide the privacy-preserving authentication mechanism for the blockchain. In the traditional blockchain privacy-preserving scheme based on the group signature, there is only one group manager to revoke the anonymity. Thus, the traditional scheme will have single point of failure and key escrow problems. To solve these problems, we propose a privacy-preserving scheme in the blockchain based on the group signature with multiple managers. Our scheme is constructed based on bilinear pairing and the technique of distributed key generation. Finally, we analyze the application of the proposed scheme in the field of blockchain-based provable data possession (PDP), as well as the correctness and security of the scheme.

scholarly journals An Efficient Identity-Based Conditional Privacy-Preserving Authentication Scheme for Secure Communication in a Vehicular Ad Hoc Network

Symmetry ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 1687 ◽  
Author(s):  
Mahmood A. Al-shareeda ◽  
Mohammed Anbar ◽  
Selvakumar Manickam ◽  
Iznan H. Hasbullah
Keyword(s):  
Secure Communication ◽  
Large Scale ◽  
Ad Hoc ◽  
Privacy Preserving ◽  
Authentication Scheme ◽  
Security And Privacy ◽  
Group Signature ◽  
Side Channel ◽  
Sensitive Information ◽  
Identity Based

The security and privacy issues in vehicular ad hoc networks (VANETs) are often addressed with schemes based on either public key infrastructure, group signature, or identity. However, none of these schemes appropriately address the efficient verification of multiple VANET messages in high-density traffic areas. Attackers could obtain sensitive information kept in a tamper-proof device (TPD) by using a side-channel attack. In this paper, we propose an identity-based conditional privacy-preserving authentication scheme that supports a batch verification process for the simultaneous verification of multiple messages by each node. Furthermore, to thwart side-channel attacks, vehicle information in the TPD is periodically and frequently updated. Finally, since the proposed scheme does not utilize the bilinear pairing operation or the Map-To-Point hash function, its performance outperforms other schemes, making it viable for large-scale VANETs deployment.

scholarly journals Conditional privacy-preserving authentication with access likability for roaming service over internet of things

2018 ◽  
Vol 7 (1.9) ◽  
pp. 34
Author(s):  
P S Uma Priyadarsini ◽  
P Sriramya
Keyword(s):  
Internet Of Things ◽  
Privacy Preservation ◽  
Service Providers ◽  
Privacy Preserving ◽  
Group Signature ◽  
The Internet ◽  
Service Usage ◽  
Internet Service ◽  
Access Information ◽  
The Individual

Today the mobile subscribers can access the internet service whenever they want or wherever they are because of the roaming service. The necessity of accessing pervasively for the developing paradigm of networking such as the Internet of Things (IoT) is accomplished through this facility. In order to provide universal roaming service which is secure and privacy preserving at the multilevel, this paper proposes a privacy-preserving validation which is conditional with access likability called CPAL for roaming service. By utilizing a method of group signature it provides linking function of an anonymous user. This method has the capability to keep the identity of the users concealed and makes the authorized bodies possible to connect all the access information of the same user even without knowing the user’s real identity. In order to connect the access information from the user for enhancing the service, the foreign operators who are authorized or the service providers particularly uses the master linking key possessed by the trust linking server. In order to examine user’s likings, the individual access information is used but user’s identity is not disclosed. Subscribers can further make use of this functionality to probe the service usage without being identified. The proposed method also has the efficiency to simultaneously revoke a group of users. Comprehensive analysis of CPAL demonstrates that it can withstand many security threats and more adjustable in privacy preservation as compared to the other techniques. Assessment of its performance further proves the efficiency of CPAL with regards to communication and computation overhead. Future work would include the extension of CPAL scheme to effectively withstand internal attackers and design the lightweight secure and privacy-preserving scheme that will support IoT devices of large group.

scholarly journals A Fair and Privacy-Preserving Image Trading System Based on Blockchain and Group Signature

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Le Wang ◽  
Xuefeng Liu ◽  
Xiaodong Lin
Keyword(s):  
Private Information ◽  
Service Providers ◽  
Privacy Preserving ◽  
Group Signature ◽  
Communication Overhead ◽  
Source Image ◽  
User Privacy ◽  
Trading System ◽  
Daily Lives ◽  
Smart Contract

With the rise of digital images in our daily lives, there is a growing need to provide an image trading market where people can monetize their images and get desired images at prices that fit their budget. Those images are usually uploaded and stored onto centralized image trading service providers’ servers and the transactions for image trading are processed by these providers. Unfortunately, transaction unfairness and users’ privacy breaches have become major concerns since the service providers might be untrusted and able to manipulate image trading prices and infer users’ private information. Recently, several approaches have been proposed to address the unfairness issue by using the decentralized ledger technique and smart contract, but users’ privacy protection is not considered. In this paper, we propose a fair and privacy-preserving protocol that supports image fair exchange and protect user privacy. In particular, we exploit blockchain and Merkle tree to construct a fair image trading protocol with low communication overhead based on smart contract, which serves as an external judge that resolves disputes between buyers and sellers in image transactions. Moreover, we extend a popular short group signature scheme to protect users’ identity privacy, prevent linkability of transactions from being inferred, and ensure traceability of malicious users who may sell fake images and/or refuse to pay. Finally, we design and build a practical and open-source image trading system to evaluate the performance of our proposed protocol. Experimental results demonstrate its effectiveness and efficiency in real-world applications.

scholarly journals SE-CPPA: A Secure and Efficient Conditional Privacy-Preserving Authentication Scheme in Vehicular Ad-Hoc Networks

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8206
Author(s):  
Mahmood A. Al-Shareeda ◽  
Mohammed Anbar ◽  
Selvakumar Manickam ◽  
Iznan H. Hasbullah
Keyword(s):  
Ad Hoc Networks ◽  
Hash Function ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Privacy Preserving ◽  
Security And Privacy ◽  
Group Signature ◽  
Communication Costs ◽  
Short Period ◽  
Hoc Networks

Communications between nodes in Vehicular Ad-Hoc Networks (VANETs) are inherently vulnerable to security attacks, which may mean disruption to the system. Therefore, the security and privacy issues in VANETs are entitled to be the most important. To address these issues, the existing Conditional Privacy-Preserving Authentication (CPPA) schemes based on either public key infrastructure, group signature, or identity have been proposed. However, an attacker could impersonate an authenticated node in these schemes for broadcasting fake messages. Besides, none of these schemes have satisfactorily addressed the performance efficiency related to signing and verifying safety traffic-related messages. For resisting impersonation attacks and achieving better performance efficiency, a Secure and Efficient Conditional Privacy-Preserving Authentication (SE-CPPA) scheme is proposed in this paper. The proposed SE-CPPA scheme is based on the cryptographic hash function and bilinear pair cryptography for the signing and verifying of messages. Through security analysis and comparison, the proposed SE-CPPA scheme can accomplish security goals in terms of formal and informal analysis. More precisely, to resist impersonation attacks, the true identity of the vehicle stored in the tamper-proof device (TPD) is frequently updated, having a short period of validity. Since the MapToPoint hash function and a large number of cryptography operations are not employed, simulation results show that the proposed SE-CPPA scheme outperforms the existing schemes in terms of computation and communication costs. Finally, the proposed SE-CPPA scheme reduces the computation costs of signing the message and verifying the message by 99.95% and 35.93%, respectively. Meanwhile, the proposed SE-CPPA scheme reduces the communication costs of the message size by 27.3%.

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