scholarly journals CRYPTANALYSIS AND IMPROVEMENT OF A PROXY SIGNATURE WITH MESSAGE RECOVERY USING SELF-CERTIFIED PUBLIC KEY

2016 ◽  
Vol 53 (4) ◽  
pp. 1051-1069
Author(s):  
Manoj Kumar Chande ◽  
Cheng-Chi Lee
Keyword(s):  
Proxy Signature ◽  
Public Key ◽  
Message Recovery

Attacks on Self-Certified Multi-Proxy Signature Schemes with Message Recovery

2011 ◽  
Vol 135-136 ◽  
pp. 316-320
Author(s):  
Qi Xie
Keyword(s):  
Finite Field ◽  
Elliptic Curve ◽  
Proxy Signature ◽  
Public Key ◽  
Signature Verification ◽  
Signature Schemes ◽  
Discrete Logarithms ◽  
The Public ◽  
Message Recovery ◽  
Public Keys

Signature schemes with message recovery based on self-certified public keys can reduce the amount of communications and computations, since the signature verification, the public key authentication and the message recovery are simultaneously carried out in a single logical step. Integrating self-certified public-key systems and the message recovery signature schemes, in 2009, Wu et al. proposed two multi-proxy signatures based on the discrete logarithms over a finite field and the elliptic curve discrete logarithms. The proxy warrant revision attacks are proposed, and it will show that Wu et al.’s schemes can not resist the proxy warrant revision attacks by either the proxy group or the original signer.

scholarly journals Design and development of a secure certificateless proxy signature based (SE-CLPS) encryption scheme for cloud storage

2021 ◽  
Vol 10 (1) ◽  
pp. 57
Author(s):  
Ms. K. Sudharani ◽  
Dr. N. K. Sakthivel
Keyword(s):  
Computational Cost ◽  
Public Key Cryptography ◽  
True Positive Rate ◽  
Proxy Signature ◽  
Attack Detection ◽  
Third Party ◽  
Public Key ◽  
Secret Key ◽  
True Negative ◽  
The Public

Certificateless Public Key Cryptography (CL-PKC) scheme is a new standard that combines Identity (ID)-based cryptography and tradi- tional PKC. It yields better security than the ID-based cryptography scheme without requiring digital certificates. In the CL-PKC scheme, as the Key Generation Center (KGC) generates a public key using a partial secret key, the need for authenticating the public key by a trusted third party is avoided. Due to the lack of authentication, the public key associated with the private key of a user may be replaced by anyone. Therefore, the ciphertext cannot be decrypted accurately. To mitigate this issue, an Enhanced Certificateless Proxy Signature (E-CLPS) is proposed to offer high security guarantee and requires minimum computational cost. In this work, the Hackman tool is used for detecting the dictionary attacks in the cloud. From the experimental analysis, it is observed that the proposed E-CLPS scheme yields better Attack Detection Rate, True Positive Rate, True Negative Rate and Minimum False Positives and False Negatives than the existing schemes.   

scholarly journals On the Security of a Certificateless Proxy Signature Scheme with Message Recovery

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Wenbo Shi ◽  
Debiao He ◽  
Peng Gong
Keyword(s):  
Distributed Systems ◽  
Grid Computing ◽  
Mobile Agent ◽  
Mobile Communications ◽  
Distribution Networks ◽  
Proxy Signature ◽  
Type I ◽  
Signature Scheme ◽  
Practical Applications ◽  
Message Recovery

A proxy signature scheme allows a proxy signer to sign messages on behalf of an original signer within a given context. It has lots of practical applications in distributed systems, grid computing, mobile agent applications, distributed shared object systems, global distribution networks, and mobile communications. Recently, Padhye et al. proposed a certificateless proxy signature scheme with message recovery and claimed the scheme is secure against both of the two types of adversaries. However, in this paper, we will show that Padhye et al.’s scheme is not secure against the Type I adversary. The analysis shows their scheme is not secure for practical applications.

A Blind Proxy Re-Signatures Scheme Based on Random Oracle

2011 ◽  
Vol 204-210 ◽  
pp. 1062-1065 ◽  
Author(s):  
Yu Qiao Deng
Keyword(s):  
Digital Signature ◽  
Digital Signatures ◽  
Random Oracle ◽  
Proxy Signature ◽  
Public Key ◽  
Signature Scheme ◽  
Signature Schemes

Digital signature schemes allow a signer to transform any message into a signed message, such that anyone can verify the validity of the signed message using the signer’s public key, but only the signer can generate signed messages. A proxy re-signature, which is a type of digital signatures, has significant applications in many areas. Proxy signature scheme was first introduced by Blaze, Bleumer, and Strauss, but that scheme is inefficient and with limited features. After that, some Proxy re-signature schemes were proposed by researchers. This paper constructs a blind proxy re-signatures scheme. Comparing to the previous proxy re-signature schemes, the scheme adds a message blinded feature, and then the security of the scheme is proven.

Group public key encryption with equality test against offline message recovery attack

2020 ◽  
Vol 510 ◽  
pp. 16-32 ◽  
Author(s):  
Yunhao Ling ◽  
Sha Ma ◽  
Qiong Huang ◽  
Ximing Li ◽  
Yunzhi Ling
Keyword(s):  
Public Key ◽  
Public Key Encryption ◽  
Message Recovery ◽  
Equality Test
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