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.

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

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 An Anonymous Multireceiver with Online/Offline Identity-Based Encryption

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Qihua Wang ◽  
Fagen Li ◽  
Huaqun Wang
Keyword(s):  
Computational Cost ◽  
Limited Resource ◽  
Sensor Nodes ◽  
Limited Resources ◽  
Encryption Scheme ◽  
Private Key ◽  
Identity Based Encryption ◽  
Identity Based ◽  
Mail Address ◽  
E Mail

Anonymous multireceiver encryption scheme can not only protect the privacy of the receiver but also ensure the security of message. However, the computational cost of this scheme is very large. It is not suitable for the sender which has limited resources, such as mobile devices and sensor nodes. In this work, an anonymous multireceiver online/offline identity-based encryption is proposed based on offline/online and identity-based encryption (IBE). In identity-based encryption scheme, the sender can encrypt the message using the unique information of the user (such as identity number or e-mail address) as its public key. The receiver obtains the private key from a central authority. For mobile device with limited resource, the online/offline encryption scheme can reduce the computational cost. Compared to the previous anonymous multireceiver schemes, the proposed scheme can efficiently encrypt message with offline/online method and ensure the anonymity of receivers. The analysis results also show that our scheme is efficient in terms of computational cost by comparing to the previous works.

Security of Identity-Based Encryption Algorithms

2018 ◽  
pp. 4975-4984
Author(s):  
Kannan Balasubramanian ◽  
M. Rajakani
Keyword(s):  
Key Management ◽  
Public Key ◽  
The Public ◽  
Private Key ◽  
Identity Based Encryption ◽  
Public Keys ◽  
Identity Based ◽  
Encryption Algorithms ◽  
Encrypted Communication ◽  
E Mail

The concept of Identity Based Cryptography introduced the idea of using arbitrary strings such as e-mail addresses and IP Addresses to form public keys with the corresponding private keys being created by the Trusted Authority(TA) who is in possession of a system-wide master secret. Then a party, Alice who wants to send encrypted communication to Bob need only Bob's identifier and the system-wide public parameters. Thus the receiver is able to choose and manipulate the public key of the intended recipient which has a number of advantages. While IBC removes the problem of trust in the public key, it introduces trust in the TA. As the TA uses the system-wide master secret to compute private keys for users in the system, it can effectively recompute a private key for any arbitrary string without having to archive private keys. This greatly simplifies key management as the TA simply needs to protect its master secret.

Security of Identity-Based Encryption Algorithms

2019 ◽  
pp. 312-325
Author(s):  
Kannan Balasubramanian ◽  
M. Rajakani
Keyword(s):  
Key Management ◽  
Public Key ◽  
The Public ◽  
Private Key ◽  
Identity Based Encryption ◽  
Public Keys ◽  
Identity Based ◽  
Encryption Algorithms ◽  
Encrypted Communication ◽  
E Mail

The concept of identity-based cryptography introduced the idea of using arbitrary strings such as e-mail addresses and IP addresses to form public keys with the corresponding private keys being created by the trusted authority (TA) who is in possession of a systemwide master secret. Then a party, Alice, who wants to send encrypted communication to Bob need only Bob's identifier and the systemwide public parameters. Thus, the receiver is able to choose and manipulate the public key of the intended recipient which has a number of advantages. While IBC removes the problem of trust in the public key, it introduces trust in the TA. As the TA uses the systemwide master secret to compute private keys for users in the system, it can effectively recompute a private key for any arbitrary string without having to archive private keys. This greatly simplifies key management as the TA simply needs to protect its master secret.

scholarly journals A New Identity-Based Encryption Scheme with Accountable Authority Based on SM9

2021 ◽  
Author(s):  
Ke Wang ◽  
Yuan Zhao ◽  
Song Luo ◽  
Zhi Guan
Keyword(s):  
Encryption Scheme ◽  
Private Key ◽  
Identity Based Encryption ◽  
Encryption And Decryption ◽  
Identity Based

Accountable authority identity-based encryption (A-IBE) is an extension of identity-based encryption (IBE) in which private key’s source can be traced, i.e., whether the key comes from a private key generator or a user. SM9 is an official cryptography standard of China which defines a practical IBE scheme. In this paper, we construct a practical A-IBE scheme from the SM9-IBE scheme. Our A-IBE scheme has public traceability and is proven secure if the based SM9-IBE scheme is secure. Compared with other A-IBE schemes, our A-IBE scheme has better efficiency in encryption and decryption.

Identity-Based Cryptography

2013 ◽  
pp. 430-450 ◽  
Author(s):  
Jenny Torres ◽  
Michele Nogueira ◽  
Guy Pujolle
Keyword(s):  
Computer Systems ◽  
Third Party ◽  
Future Trends ◽  
Key Escrow ◽  
Private Key ◽  
Identity Based Encryption ◽  
Data Authentication ◽  
Communication Device ◽  
Identity Based ◽  
Identity Based Cryptography

Since computer systems and communication become each time more pervasive, information security takes attention, requiring guarantees for data authentication, integrity and confidentiality. Pervasive communication and computer systems intend to provide access to information and services anytime and anywhere, demanding cryptographic systems more practical and that consider the characteristics of emerging network paradigms, such as wireless communication, device constraints and mobility. Identity-Based Cryptography (IBC) is an asymmetric key cryptographic technology that employs as user’s public key any unique information related to the identity of the user. IBC efficiently manages keying material and provides an easy way to issue a pair of keys applying user information. However, it assumes the existence of a Trusted Third Party (TTP), called Private Key Generator (PKG), which is responsible for generating the corresponding user private key. Relying on a TTP and using an identity as the base of the scheme result in different weaknesses on the system, as the inherent key escrow problem. This chapter investigates those weaknesses, and it points out the stat-of-the-art of proposed solutions to avoid them. This chapter also provides an overview of Identity-Based Encryption (IBE), Identity-Based Signature (IBS) and Identity-Based Key Agreement (IBKA), emphasizing IBE due to being an open problem for many years. This chapter concludes highlighting IBC applications and future trends.

An Efficient Identity Based Encryption in Cloud Computing with Outsourced Revocation

2020 ◽  
pp. 72-82
Author(s):  
U. Vijay Sankar ◽  
M. Pavithra ◽  
R Suganya
Keyword(s):  
Cloud Computing ◽  
Cloud Service ◽  
Public Key Infrastructure ◽  
Third Party ◽  
Public Key ◽  
Public Key Encryption ◽  
Private Key ◽  
Identity Based Encryption ◽  
Identity Based ◽  
Key Update

Identity-Based Encryption (IBE) which simplifies the public key and certificate management at Public Key Infrastructure (PKI) is an important alternative to public key encryption. However, one of the main efficiency drawbacks of IBE is the overhead computation at Private Key Generator (PKG) during user revocation. Efficient revocation has been well studied in traditional PKI setting, but the cumbersome management of certificates is precisely the burden that IBE strives to alleviate [2]. It aiming at tackling the critical issue of identity revocation, we introduce outsourcing computation into IBE for the first time and propose a revocable IBE scheme in the server-aided setting. Our scheme offloads most of the key generation related operations during key-issuing and key-update processes to a Key Update Cloud Service Provider, leaving only a constant number of simple operations for PKG and users to perform locally [3]. This goal is achieved by utilizing a novel collusion-resistant technique: we employ a hybrid private key for each user, in which an AND gate is involved to connect and bound the identity component and the time component [4]. Furthermore, we propose another construction which is provable secure under the recently formulized Refereed Delegation of Computation model. Finally, we provide extensive experimental results to demonstrate the efficiency of our proposed construction. In public key encryption every user must have a pair of keys, public key and private key, for encrypting and decrypting messages. An Identity-based encryption (IBE) eliminates the need for a Public Key Infrastructure (PKI). IBE uses the human intelligible identities (e.g., unique name, email address, IP address, etc) as public keys [5]. The sender using IBE encrypts message with the receivers’ identity rather than looking for receivers’ public key and corresponding certificate. Accordingly, receiver decrypts ciphertext using private key associated with the corresponding identity [6]. The private keys of users are obtained from a trusted third party called as Private Key Generator (PKG). The motivation of this paper is to study and review an efficient and secure Identity based encryption scheme with outsourced revocation for cloud computing [7].

Identity-Based Cryptography

2013 ◽  
pp. 162-182
Author(s):  
Jenny Torres ◽  
Michele Nogueira ◽  
Guy Pujolle
Keyword(s):  
Computer Systems ◽  
Third Party ◽  
Future Trends ◽  
Key Escrow ◽  
Private Key ◽  
Identity Based Encryption ◽  
Data Authentication ◽  
Communication Device ◽  
Identity Based ◽  
Identity Based Cryptography

Since computer systems and communication become each time more pervasive, information security takes attention, requiring guarantees for data authentication, integrity and confidentiality. Pervasive communication and computer systems intend to provide access to information and services anytime and anywhere, demanding cryptographic systems more practical and that consider the characteristics of emerging network paradigms, such as wireless communication, device constraints and mobility. Identity-Based Cryptography (IBC) is an asymmetric key cryptographic technology that employs as user’s public key any unique information related to the identity of the user. IBC efficiently manages keying material and provides an easy way to issue a pair of keys applying user information. However, it assumes the existence of a Trusted Third Party (TTP), called Private Key Generator (PKG), which is responsible for generating the corresponding user private key. Relying on a TTP and using an identity as the base of the scheme result in different weaknesses on the system, as the inherent key escrow problem. This chapter investigates those weaknesses, and it points out the stat-of-the-art of proposed solutions to avoid them. This chapter also provides an overview of Identity-Based Encryption (IBE), Identity-Based Signature (IBS) and Identity-Based Key Agreement (IBKA), emphasizing IBE due to being an open problem for many years. This chapter concludes highlighting IBC applications and future trends.

Practical identity-based encryption in multiple private key generator (PKG) environments

2013 ◽  
Vol 8 (1) ◽  
pp. 43-50 ◽  
Author(s):  
Shengbao Wang ◽  
Zhenfu Cao ◽  
Qi Xie ◽  
Wenhao Liu
Keyword(s):  
Practical Identity ◽  
Private Key ◽  
Identity Based Encryption ◽  
Identity Based
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