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CP-IPFE: Ciphertext-Policy Based Inner Product Functional Encryption
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DOI：10.1109/TIFS.2024.3396395.png)
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摘要
En 中文
Access control schemes in predicate encryption can effectively reduce the risk of information leakage in the inner product function encryption (IPFE). However, when we try to transition from identity-based IPFE to attribute-based IPFE, the fine-grained nature of attributes induces some unprecedented access control problems. These problems not only lead to incorrect inner product computation results from attribute-based IPFE but also inevitable passive information leakage induced by large attribute set secret key. At the same time, since the above problems are not common in identity-based IPFE and traditional ABEs, they cannot be properly addressed by existing schemes. To address the above problems, we introduce a new scheme - Ciphertext Policy Based Inner Product Functional Encryption (CP-IPFE). In this scheme, we propose to use a label vector to label the attributes of n-dimensional vectors and encode them onto the relevant information, so as to ensure that the attribute-based IPFE will not output incorrect inner-product computation results; establishing a leaf node set-based reverse access control policy to realize reverse access control on risky ciphertext, ensures that risky ciphertext will not be leaked encrypted-information by the secret key of large attribute sets. In addition, CP-IPFE also has the characteristics of traditional attribute encryption and supports more fine-grained access control. Finally, we prove the CPA security of the CP-IPFE in the GGM model and show a detailed application of the CP-IPFE on a general-purpose platform.
Keyword:
IPFE
GGM
ABE
access control
fine-grained
期刊
IF:
8
论文数:
5.3K
被引数:
2.3W
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