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 Identity-Based Identification Scheme without Trusted Party against Concurrent Attacks

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Fei Tang ◽  
Jiali Bao ◽  
Yonghong Huang ◽  
Dong Huang ◽  
Fuqun Wang
Keyword(s):  
Random Oracle Model ◽  
Random Oracle ◽  
Bilinear Pairing ◽  
Key Generation ◽  
Secret Key ◽  
Key Escrow ◽  
Identification Scheme ◽  
Identification Schemes ◽  
Secret Keys ◽  
Identity Based

Identification schemes support that a prover who holding a secret key to prove itself to any verifier who holding the corresponding public key. In traditional identity-based identification schemes, there is a key generation center to generate all users’ secret keys. This means that the key generation center knows all users’ secret key, which brings the key escrow problem. To resolve this problem, in this work, we define the model of identity-based identification without a trusted party. Then, we propose a multi-authority identity-based identification scheme based on bilinear pairing. Furthermore, we prove the security of the proposed scheme in the random oracle model against impersonation under passive and concurrent attacks. Finally, we give an application of the proposed identity-based identification scheme to blockchain.

scholarly journals Multi-Zone Authentication and Privacy-Preserving Protocol (MAPP) Based on the Bilinear Pairing Cryptography for 5G-V2X

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 665
Author(s):  
Shimaa A. Abdel Hakeem ◽  
HyungWon Kim
Keyword(s):  
Generation Time ◽  
Large Scale ◽  
High Reliability ◽  
Privacy Preserving ◽  
Bilinear Pairing ◽  
Security Level ◽  
Key Generation ◽  
Signature Generation ◽  
Verification Time ◽  
Broadcast Authentication

5G-Vehicle-to-Everything (5G-V2X) supports high-reliability and low latency autonomous services and applications. Proposing an efficient security solution that supports multi-zone broadcast authentication and satisfies the 5G requirement is a critical challenge. In The 3rd Generation Partnership Project (3GPP) Release 16 standard, for Cellular- Vehicle-to-Everything (C-V2X) single-cell communication is suggested to reuse the IEEE1609.2 security standard that utilizes the Public Key Infrastructure (PKI) cryptography. PKI-based solutions provide a high-security level, however, it suffers from high communication and computation overhead, due to the large size of the attached certificate and signature. In this study, we propose a light-weight Multi-Zone Authentication and Privacy-Preserving Protocol (MAPP) based on the bilinear pairing cryptography and short-size signature. MAPP protocol provides three different authentication methods that enable a secure broadcast authentication over multiple zones of large-scale base stations, using a single message and a single short signature. We also propose a centralized dynamic key generation method for multiple zones. We implemented and analyzed the proposed key generation and authentication methods using an authentication simulator and a bilinear pairing library. The proposed methods significantly reduce the signature generation time by 16 times–80 times, as compared to the previous methods. Additionally, the proposed methods significantly reduced the signature verification time by 10 times–16 times, as compared to the two previous methods. The three proposed authentication methods achieved substantial speed-up in the signature generation time and verification time, using a short bilinear pairing signature.

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 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 The OLYMPUS Architecture—Oblivious Identity Management for Private User-Friendly Services

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 945 ◽  
Author(s):  
Rafael Torres Moreno ◽  
Jorge Bernal Bernabe ◽  
Jesús García Rodríguez ◽  
Tore Kasper Frederiksen ◽  
Michael Stausholm ◽  
...  
Keyword(s):  
Identity Management ◽  
Service Providers ◽  
Single Point ◽  
Building Blocks ◽  
Privacy Preserving ◽  
Privacy And Security ◽  
Iot Devices ◽  
Eu Project ◽  
Cryptographic Techniques ◽  
Identity Provider

Privacy enhancing technologies (PETs) allow to achieve user’s transactions unlinkability across different online Service Providers. However, current PETs fail to guarantee unlinkability against the Identity Provider (IdP), which becomes a single point of failure in terms of privacy and security, and therefore, might impersonate its users. To address this issue, OLYMPUS EU project establishes an interoperable framework of technologies for a distributed privacy-preserving identity management based on cryptographic techniques that can be applied both to online and offline scenarios. Namely, distributed cryptographic techniques based on threshold cryptography are used to split up the role of the Identity Provider (IdP) into several authorities so that a single entity is not able to impersonate or track its users. The architecture leverages PET technologies, such as distributed threshold-based signatures and privacy attribute-based credentials (p-ABC), so that the signed tokens and the ABC credentials are managed in a distributed way by several IdPs. This paper describes the Olympus architecture, including its associated requirements, the main building blocks and processes, as well as the associated use cases. In addition, the paper shows how the Olympus oblivious architecture can be used to achieve privacy-preserving M2M offline transactions between IoT devices.

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