Retained-Key Encryption

2013 ◽  
Vol 5 (2) ◽  
pp. 1-17
Author(s):  
David Crowe ◽  
Wasim Al-Hamdani
Keyword(s):  
Key Management ◽  
Secure Communication ◽  
Communication Channel ◽  
User Authentication ◽  
Third Party ◽  
Management Model ◽  
Trusted Third Party ◽  
Software Application ◽  
Private Key ◽  
Alternative Means

This paper presents a synchronous encryption key management model that does not require the sender to disclose the encryption key in order to effect decryption. This eliminates the need for key exchange mechanisms, giving the sender improved control over their keys. The retained-key model is presented as being a software application that handles the initiation of a secure communication channel between sender and receiver, and facilitates user authentication by a trusted third party—presumably, the software’s vendor. This model is not intended to replace public/private key-based mechanisms, as they serve an important role in message signing and authentication. Rather, it seeks to provide an alternative means of decrypting messages in a secure fashion while allowing the sender to avoid the need to disclose the message’s key.

scholarly journals Lattice-based remote user authentication from reusable fuzzy signature

2021 ◽  
pp. 1-26
Author(s):  
Yangguang Tian ◽  
Yingjiu Li ◽  
Robert H. Deng ◽  
Binanda Sengupta ◽  
Guomin Yang
Keyword(s):  
Communication Channel ◽  
User Authentication ◽  
Third Party ◽  
Quantum Computers ◽  
User Privacy ◽  
Remote User Authentication ◽  
Security Models ◽  
Authentication Server ◽  
New Construction ◽  
Remote User

In this paper, we introduce a new construction of reusable fuzzy signature based remote user authentication that is secure against quantum computers. We investigate the reusability of fuzzy signature, and we prove that the fuzzy signature schemes provide biometrics reusability (aka. reusable fuzzy signature). We define formal security models for the proposed construction, and we prove that it achieves user authenticity and user privacy. The proposed construction ensures: 1) a user’s biometrics can be securely reused in remote user authentication; 2) a third party having access to the communication channel between a user and the authentication server cannot identify the user.

Implementation of Algorithms for Identity Based Encryption and Decryption

2021 ◽  
pp. 315-327
Author(s):  
Kannan Balasubramanian ◽  
M. Rajakani
Keyword(s):  
Third Party ◽  
Public And Private ◽  
Trusted Third Party ◽  
Private Key ◽  
Identity Based Encryption ◽  
Encryption And Decryption ◽  
Semantic Security ◽  
Identity Based ◽  
Mail Address ◽  
E Mail

Identity-based cryptosystems were introduced to overcome one of the main problems in public key encryption, the generation of public and private keys. In the identity-based cryptosystem, an identifier such as an e-mail address of a user can be used to generate public and private keys by a trusted third party. The trusted third party uses a system-wide master secret to provide private keys to a user. Identity-based cryptosystems can be constructed using the idea of pairings. This article discusses four different identity-based cryptosystems: the Boneh-Franklin scheme, the Cock's scheme, the Authenticated IBE scheme and the Hierarchical IBE scheme. This article also discusses the security notions considered for the identity-based cryptosystem. The security notions considered are: one-wayness, indistinguishability, semantic security and non-malleability. An architecture consisting of a public parameter server and private key generator for the implementation of the identity-based cryptosystems is also discussed.

Implementation of Algorithms for Identity Based Encryption and Decryption

2021 ◽  
pp. 320-332
Author(s):  
Kannan Balasubramanian ◽  
M. Rajakani
Keyword(s):  
Third Party ◽  
Public And Private ◽  
Trusted Third Party ◽  
Private Key ◽  
Identity Based Encryption ◽  
Encryption And Decryption ◽  
Semantic Security ◽  
Identity Based ◽  
Mail Address ◽  
E Mail

Identity-based cryptosystems were introduced to overcome one of the main problems in public key encryption, the generation of public and private keys. In the identity-based cryptosystem, an identifier such as an e-mail address of a user can be used to generate public and private keys by a trusted third party. The trusted third party uses a system-wide master secret to provide private keys to a user. Identity-based cryptosystems can be constructed using the idea of pairings. This article discusses four different identity-based cryptosystems: the Boneh-Franklin scheme, the Cock's scheme, the Authenticated IBE scheme and the Hierarchical IBE scheme. This article also discusses the security notions considered for the identity-based cryptosystem. The security notions considered are: one-wayness, indistinguishability, semantic security and non-malleability. An architecture consisting of a public parameter server and private key generator for the implementation of the identity-based cryptosystems is also discussed.

scholarly journals A Secure Data Storage Strategy for Private Cloud

2020 ◽  
Vol 9 (6) ◽  
pp. 1043-1049
Keyword(s):  
Data Storage ◽  
Data Security ◽  
Key Management ◽  
Data Encryption ◽  
Cloud Services ◽  
Third Party ◽  
Widespread Application ◽  
Trusted Third Party ◽  
Cloud Data ◽  
Security Issues

In recent years, with the widespread application of cloud computing, more and more enterprises, institutions, and individuals have started to use cloud services to place their data in the cloud. With the rise of cloud services, the accompanying data security issues have received increasing attention. Because data stores are in the cloud, there are many outstanding security issues. This paper proposes a public cloud data security solution based on a trusted third-party platform. The solution is based on an independent and trusted third-party platform, and has certain advantages in data encryption, key management, data awareness, data sharing, and accident responsibility.

Implementation of Algorithms for Identity Based Encryption and Decryption

2019 ◽  
Vol 1 (1) ◽  
pp. 52-62
Author(s):  
Kannan Balasubramanian ◽  
M. Rajakani
Keyword(s):  
Third Party ◽  
Public Key Encryption ◽  
Public And Private ◽  
Trusted Third Party ◽  
Private Key ◽  
Encryption And Decryption ◽  
Semantic Security ◽  
Identity Based ◽  
Mail Address ◽  
E Mail

Identity-based cryptosystems were introduced to overcome one of the main problems in public key encryption, the generation of public and private keys. In the identity-based cryptosystem, an identifier such as an e-mail address of a user can be used to generate public and private keys by a trusted third party. The trusted third party uses a system-wide master secret to provide private keys to a user. Identity-based cryptosystems can be constructed using the idea of pairings. This article discusses four different identity-based cryptosystems: the Boneh-Franklin scheme, the Cock's scheme, the Authenticated IBE scheme and the Hierarchical IBE scheme. This article also discusses the security notions considered for the identity-based cryptosystem. The security notions considered are: one-wayness, indistinguishability, semantic security and non-malleability. An architecture consisting of a public parameter server and private key generator for the implementation of the identity-based cryptosystems is also discussed.

scholarly journals A Hierarchical Key Management Scheme in Mobile Ad hoc Networks

2011 ◽  
Vol 1 ◽  
pp. 295-299
Author(s):  
Jun Wu ◽  
Run Hua Shi ◽  
Hong Zhong
Keyword(s):  
Ad Hoc Networks ◽  
Mobile Ad Hoc Networks ◽  
Secret Sharing ◽  
Key Management ◽  
Ad Hoc ◽  
Private Key ◽  
Management Scheme ◽  
Mobile Ad Hoc ◽  
Hoc Networks ◽  
Key Management Scheme

This paper proposes a hierarchical key management scheme in the mobile Ad hoc networks. In this scheme, there are two kinds of server nodes: the special server nodes and the ordinary server nodes, such that only when two kinds of server nodes collaborate can they provide a certificate service. In order to satisfy this special application, we design a new secret sharing scheme for splitting the system private key, in which it generates two different kinds of shares of the system private key: the special share and the ordinary share, where it needs at least one special share and t ordinary shares to recover the system private key, thus we call it threshold scheme. Furthermore, we present a distributed signature scheme for a user’s certificate in the mobile Ad hoc networks based on this secret sharing.

scholarly journals Securing Cloud Data using RSA Algorithm

2018 ◽  
Vol 6 (4) ◽  
pp. 96
Author(s):  
Md Equebal Hussain ◽  
Mohammad Rashid Hussain
Keyword(s):  
Storage Capacity ◽  
Internet Security ◽  
Third Party ◽  
Combined Method ◽  
Cloud Data ◽  
Security Issues ◽  
Rsa Algorithm ◽  
Private Key ◽  
Important Concern ◽  
Encryption Algorithms

security is one of the most important concern on cloud computing therefore institutions are hesitating to host their data over cloud. Not all data can be afforded to move on the cloud (example accounts data). The main purpose of moving data over cloud is to reduce cost (infrastructure and maintenance), faster performance, easy upgrade, storage capacity but at the same time security is major concern because cloud is not private but maintained by third party over the internet, security issues like privacy, confidentiality, authorization (what you are allowed to do), authentication (who you are) and accounting (what you actually do) will be encountered. Variety of encryption algorithms required for higher level of security. In this paper we try to provide solution for better security by proposing a combined method of key exchange algorithm with encryption technique. Data stored in cloud can be protected from hackers using proposed solution because even if transmitted key is hacked of no use without user’s private key.

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