Open Access

ARTICLE

Dynamic Time and Location Information in Ciphertext-Policy Attribute-Based Encryption with Multi-Authorization

P. Prathap Nayudu, Krovi Raja Sekhar^*

Department of Computer Science and Engineering, Koneru Lakshmaiah Education Foundation, Vaddeswaram, AP, 522 502, India

* Corresponding Author: Krovi Raja Sekhar. Email:

Intelligent Automation & Soft Computing 2023, 35(3), 3801-3813. https://doi.org/10.32604/iasc.2023.032267

Received 12 May 2022; Accepted 16 June 2022; Issue published 17 August 2022

Abstract

Due to the mobility of users in an organization, inclusion of dynamic attributes such as time and location becomes the major challenge in Ciphertext-Policy Attribute-Based Encryption (CP-ABE). By considering this challenge; we focus to present dynamic time and location information in CP-ABE with multi-authorization. At first, along with the set of attributes of the users, their corresponding location is also embedded. Geohash is used to encode the latitude and longitude of the user’s position. Then, decrypt time period and access time period of users are defined using the new time tree (NTT) structure. The NTT sets the encrypted duration of the encrypted data and the valid access time of the private key on the data user’s private key. Besides, single authorization of attribute authority (AA) is extended as multi authorization for enhancing the effectiveness of key generation. Simulation results depict that the proposed CP-ABE achieves better encryption time, decryption time, security level and memory usage. Namely, encryption time and decryption time of the proposed CP-ABE are reduced to 19% and 16% than that of existing CP-ABE scheme.

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Keywords

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