scholarly journals Revocable IBE combined with CRA to overcome the inadaptability problem

2019 ◽  
Vol 9 (1S) ◽  
pp. 71-77
Keyword(s):  
Public Key Infrastructure ◽  
Public Key ◽  
The Public ◽  
Identity Based Encryption ◽  
Cryptographic System ◽  
Identity Based ◽  
Key Update

Identity based encryption (IBE) is an open key cryptographic system and takes out the requesting of the Public key infrastructure(PKI) and confirmation relationship by and large key settings. Due to the nonappearance in PKI, the cancelation problem has become a primary issue in the IBE settings. Two or three cancellable IBE plans have been already proposed concerning this point. As of late, by embeddings an outsourcing figuring framework into the IBE, Li et al. presented a cancellable IBE scheme with the feature of key-update cloud authority association (KU-CSP). Regardless, their arrangement faces two disadvantages. One demerit is that the costs of figuring, correspondence are more than past cancellable IBE designs. Alternate limitation is nonattendance of adaptability as in KU-CSP should maintain secret regard for individual customer. Here another cancellable IBE plot with cloud cancellation authority (CRA) to understand the two disadvantages in which the execution is by and large upgraded and the CRA has only a system puzzle for each one of their customers.

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].

scholarly journals Identity Based Encryption and Identity Based Signature Scheme: A Research on Security Schemes

2019 ◽  
Vol 8 (6S4) ◽  
pp. 1330-1337
Keyword(s):  
Key Management ◽  
Public Key Cryptography ◽  
Public Key Infrastructure ◽  
Public Key ◽  
Signature Scheme ◽  
Certificate Authority ◽  
Identity Based Encryption ◽  
Computer Based ◽  
Identity Based ◽  
To Receive

In computer based system, key for the problem of identification, authentication and secrecy can be found in the field of cryptography. Dependence on public key infrastructure and to receive certificates signed by Certificate Authority (CA) to authenticate oneself for exchange of encrypted messages is one of the most significant limitation for the widespread adoption of Public Key Cryptography (PKC) as this process is time engrossing and error prone. Identity based cryptography (IBC) aspires to reduce the certificate and key management overhead of PKC. IBC’s important primordial is Identity-based Encryption (IBE). IBE provided emergent for perception of Identity based signature (IBS) schemes. In this paper, overview of IBE and IBS schemes has been given. Also, a survey on various IBE and IBS schemes has been performed to review different problems related to them. Finally, feasibility and applicability of IBC in current and future environments has been discussed.

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 Certificate-Based Provable Data Possession Scheme in the Standard Model

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Caixue Zhou
Keyword(s):  
Standard Model ◽  
High Efficiency ◽  
Public Key Infrastructure ◽  
Public Key ◽  
Provable Data Possession ◽  
The Public ◽  
The Standard Model ◽  
Identity Based ◽  
The Cost ◽  
Very High

Certificate-based cryptosystem can not only resolve the private key escrow problem inherent in the identity-based cryptosystem but also reduce the cost of public key certificate management in the public key infrastructure-(PKI-) based cryptosystem. Provable data possession (PDP) can ensure the integrity of users’ data stored in the cloud at a very high probability. By combining these two concepts, we propose a certificate-based PDP scheme. We prove that our scheme is secure in the standard model assuming that the Squ-CDH problem is hard. Based on the index logic table, our scheme can be extended to support dynamic operations easily. Efficiency analysis shows that our scheme has high efficiency.

scholarly journals Identity Based Encryption and Identity Based Signature Scheme on Security Schemes

2019 ◽  
Vol 8 (11) ◽  
pp. 3487-3493
Keyword(s):  
Key Management ◽  
Public Key Cryptography ◽  
Public Key Infrastructure ◽  
Public Key ◽  
Signature Scheme ◽  
Certificate Authority ◽  
Identity Based Encryption ◽  
Computer Based ◽  
Identity Based ◽  
To Receive

In computer based system, key for the problem of identification, authentication and secrecy can be found in the field of cryptography. Dependence on public key infrastructure and to receive certificates signed by Certificate Authority (CA) to authenticate oneself for exchange of encrypted messages is one of the most significant limitation for the widespread adoption of Public Key Cryptography (PKC) as this process is time engrossing and error prone. Identity based cryptography (IBC) aspires to reduce the certificate and key management overhead of PKC. IBC’s important primordial is Identity-based Encryption (IBE). IBE provided emergent for perception of Identity based signature (IBS) schemes. In this paper, overview of IBE and IBS schemes has been given. Also, a survey on various IBE and IBS schemes has been performed to review different problems related to them. Finally, feasibility and applicability of IBC in current and future environments has been discussed

Secure Symmetric Key Fuzzy Identity-Based Encryption

2013 ◽  
Vol 321-324 ◽  
pp. 2665-2668
Author(s):  
Peng Tao Liu
Keyword(s):  
Security Requirements ◽  
Public Key ◽  
Formal Definition ◽  
Secret Key ◽  
The Public ◽  
Identity Based Encryption ◽  
Identity Based ◽  
Symmetric Key ◽  
Definition Of ◽  
Fuzzy Identity

Symmetric key fuzzy Identity-Based Encryption (IBE) is a special type of IBE in secret key model. In this paper we extend the notion to the case of fuzzy Identity-Based Encryption, and give a formal definition of symmetric key fuzzy IBE and its security requirements. Moreover, we propose a construction of symmetric key fuzzy IBE based on the public key fuzzy IBE of Sahai and Waters, and prove its security.

A Method for Key Updating of IBE with Wildcards

2013 ◽  
Vol 765-767 ◽  
pp. 1003-1006
Author(s):  
Lu Wang
Keyword(s):  
Public Key ◽  
Expiration Date ◽  
Identity Based Encryption ◽  
User Groups ◽  
Identity Based ◽  
Key Update

A variety of identity-based encryption mechanisms are gradually developed since BF-IBE was proposed in 2001. However, since a users public key is fully open and cannot be modified, the key update issue needs to be solved urgently. And at the same time, hierarchical IBE has been proposed to reduce the burden of a single PKG. The paper suggests wildcards and put forward WIBE, which can make one-time encryption for user groups of HIBE. Then WKU is put out based on WIBE, which is a key updating mechanism in the measure of years and manages the expiration date of users keys.

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