scholarly journals On the Importance of Public-Key Validation in the MQV and HMQV Key Agreement Protocols

2006 ◽  
pp. 133-147 ◽  
Author(s):  
Alfred Menezes ◽  
Berkant Ustaoglu
Keyword(s):  
Key Agreement ◽  
Public Key ◽  
Agreement Protocols

scholarly journals Electronic Voting Protocol Using Identity-Based Cryptography

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Gina Gallegos-Garcia ◽  
Horacio Tapia-Recillas
Keyword(s):  
Key Agreement ◽  
Public Key Cryptography ◽  
Public Key ◽  
Electronic Voting ◽  
Certification Authority ◽  
Public Keys ◽  
Core Components ◽  
Identity Based ◽  
High Flexibility ◽  
Agreement Protocols

Electronic voting protocols proposed to date meet their properties based on Public Key Cryptography (PKC), which offers high flexibility through key agreement protocols and authentication mechanisms. However, when PKC is used, it is necessary to implement Certification Authority (CA) to provide certificates which bind public keys to entities and enable verification of such public key bindings. Consequently, the components of the protocol increase notably. An alternative is to use Identity-Based Encryption (IBE). With this kind of cryptography, it is possible to have all the benefits offered by PKC, without neither the need of certificates nor all the core components of a Public Key Infrastructure (PKI). Considering the aforementioned, in this paper we propose an electronic voting protocol, which meets the privacy and robustness properties by using bilinear maps.

Nonce-Based Key Agreement Protocol Against Bad Randomness

2019 ◽  
Vol 30 (04) ◽  
pp. 619-633
Author(s):  
Burong Kang ◽  
Xinyu Meng ◽  
Lei Zhang ◽  
Yinxia Sun
Keyword(s):  
Digital Signature ◽  
Key Agreement ◽  
Public Key ◽  
Security Model ◽  
Public Key Encryption ◽  
Signature Schemes ◽  
Key Agreement Protocol ◽  
Agreement Protocols

Most of the existing cryptographic schemes, e.g., key agreement protocol, call for good randomness. Otherwise, the security of these cryptographic schemes cannot be fully guaranteed. Nonce-based cryptosystem is recently introduced to improve the security of public key encryption and digital signature schemes by ensuring security when randomness fails. In this paper, we first investigate the security of key agreement protocols when randomness fails. Then we define the security model for nonce-based key agreement protocols and propose a nonce-based key agreement protocol that protects against bad randomness. The new protocol is proven to be secure in our proposed security model.

scholarly journals Secure multiparty quantum key agreement against collusive attacks

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hussein Abulkasim ◽  
Atefeh Mashatan ◽  
Shohini Ghose
Keyword(s):  
Key Agreement ◽  
Sensitive Information ◽  
Quantum Key Agreement ◽  
Key Agreement Protocol ◽  
Proposed Model ◽  
Shared Key ◽  
Agreement Protocols ◽  
Collusive Attacks ◽  
Attack Strategy ◽  
Collusive Attack

AbstractQuantum key agreement enables remote participants to fairly establish a secure shared key based on their private inputs. In the circular-type multiparty quantum key agreement mode, two or more malicious participants can collude together to steal private inputs of honest participants or to generate the final key alone. In this work, we focus on a powerful collusive attack strategy in which two or more malicious participants in particular positions, can learn sensitive information or generate the final key alone without revealing their malicious behaviour. Many of the current circular-type multiparty quantum key agreement protocols are not secure against this collusive attack strategy. As an example, we analyze the security of a recently proposed multiparty key agreement protocol to show the vulnerability of existing circular-type multiparty quantum key agreement protocols against this collusive attack. Moreover, we design a general secure multiparty key agreement model that would remove this vulnerability from such circular-type key agreement protocols and describe the necessary steps to implement this model. The proposed model is general and does not depend on the specific physical implementation of the quantum key agreement.

scholarly journals Questioning the security of three recent authentication and key agreement protocols

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Amir Masoud Rahmani ◽  
Mokhtar Mohammadi ◽  
Shima Rashidi ◽  
Jan Lansky ◽  
Stanislava Mildeova ◽  
...  
Keyword(s):  
Key Agreement ◽  
Authentication And Key Agreement ◽  
Agreement Protocols

Identity-based key agreement protocols from pairings

2007 ◽  
Vol 6 (4) ◽  
pp. 213-241 ◽  
Author(s):  
L. Chen ◽  
Z. Cheng ◽  
N. P. Smart
Keyword(s):  
Key Agreement ◽  
Identity Based ◽  
Agreement Protocols
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