A Secure Encryption Scheme Based on Certificateless Proxy Signature

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 645)

Abstract

Certificateless public key cryptography (CL-PKC) scheme is introduced for solving the key escrow problems in the identity-based cryptography and eliminating the use of security certificates. By introducing the proxy signature concept in the certificateless cryptography scheme, this certificateless proxy signature (CLPS) scheme has attracted the attention of more researchers. However, this scheme suffers due to the security issues and fails to achieve the unforgeability against the attacks. To overcome the security issues in the existing cryptographic schemes, this paper proposes an encryption scheme based on the certificateless proxy signature for sharing the sensitive data in the public cloud in a secure manner. The proposed scheme is proven to be unforgeable against the message attacks. When compared with the existing CLPS scheme without random oracles, the proposed scheme offers better data security while ensuring better data sharing performance. From the experimental results, it is noticed that the proposed scheme requires minimum encryption time and decryption time than the existing schemes.

Keywords

Access control Cloud computing Certificateless public key cryptography (CL-PKC) Data confidentiality Malicious KGC attack Proxy signature Public key replacement attack 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Bharathiar UniversityCoimbatoreIndia
  2. 2.Nehru College of Engineering and Research CentreThrissurIndia

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