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EIV-BT-ABE: Efficient Attribute-Based Encryption With Black-Box Traceability Based on Encrypted Identity Vector
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DOI：10.1109/JIOT.2023.3345134.png)
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Abstract
En 中文
The fine grain of ciphertext-policy attribute-based encryption (CP-ABE) offers advantages through the amalgamation of key and user attributes; however, it also brings the issue of key misuse. To circumvent the tracking mechanisms of the white-box algorithm, malicious users manipulate the decryption key and encryption algorithm, encapsulating them to create a black-box decryption device. This necessitates black-box traceability for supervision purposes. In this article, we employ n-bit encrypted binary vectors to depict the user's identity and subsequently convert it into partial decryption privileges. When encrypting plaintext, data owners can utilize a vague specification to define the identity vector of qualified decryptors. Furthermore, based on the vague specification mechanism, we have devised a pioneering active black-box tracing algorithm. Integrating this algorithm with CP-ABE, we propose the black-box traceable CP-ABE (EIV-BT-ABE) scheme. Our EIV-BT-ABE scheme attains strong traceability with low time complexity, effectively reducing decryption and encryption time costs. The experiment substantiated the efficiency of our scheme while demonstrating its adherence to IND-CPA security.
Keywords:
Abuse of key
access control
black-box traceability
cloud computing ciphertext-policy attribute-based encryption (CP-ABE)
privacy preserving
Journal
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