efficient multiauthority attribute based signcryption
kiruthiga.M,suvetha.A.R,swetha.v,sathya.s
Published in International Journal of Advanced Research in Computer Science Engineering and Information Technology
ISSN: 2321-3337 Impact Factor:1.521 Volume:6 Issue:3 Year: 21 April,2023 Pages:1731-1736
Abstract
Efficient multi-authority attribute-based signcryption (EMABSC) is a cryptographic technique that allows multiple authorities to collaborate in encrypting and signing messages based on certain attributes. In this paper, we propose an improved EMABSC scheme that enhances the security and efficiency of the existing approaches. Our scheme employs a hybrid encryption and signature mechanism to provide confidentiality, integrity, and authenticity of the signed and encrypted messages. It also allows multiple authorities to independently generate partial signatures and encrypt parts of the message based on specific attributes, without revealing any information to each other. To improve the efficiency of the proposed scheme, we utilize a symmetric encryption algorithm in the encryption process, which reduces the computational cost compared to existing asymmetric encryption-based schemes. We also introduce a threshold mechanism that allows for flexible control of the number of authorities needed to decrypt and verify the signature of a message. We conducted a security analysis of the proposed scheme and proved its correctness and security against various attacks. Our performance evaluation results showed that our scheme outperforms existing EMABSC schemes in terms of computational efficiency and communication overhead, making it suitable for use in various applications such as e-commerce, e-government, and cloud computing.
Kewords
Attribute Based Signature, Attribute Based Encryption, Attribute-Based Signcryption, Constant-Size Ciphertext, Multi Authority, Cloud Storage, Authentication, Confidentiality.
Reference
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