Improved AB-CPREs with Revocability and HRA Security under LWE
Attribute-based conditional proxy re-encryption protocols (AB-CPREs) enable a delegator to delegate his decryption rights via different policies and grant the data owner greater flexibility in allocating their encrypted private data stored in the cloud. However, existing lattice-based AB-CPREs suffe...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | IET Information Security |
| Online Access: | http://dx.doi.org/10.1049/2024/4333883 |
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| author | Yang Wang Mingqiang Wang |
| author_facet | Yang Wang Mingqiang Wang |
| author_sort | Yang Wang |
| collection | DOAJ |
| description | Attribute-based conditional proxy re-encryption protocols (AB-CPREs) enable a delegator to delegate his decryption rights via different policies and grant the data owner greater flexibility in allocating their encrypted private data stored in the cloud. However, existing lattice-based AB-CPREs suffer from some drawbacks such as large parameters and weak passive securities. To the best of our knowledge, the first quantum-safe key-policy AB-CPREs with polynomially bounded parameters (for certain NC 0 circuits/policies) that is selective attribute secure against honest re-encryption attacks (HRA) is presented. The security of our proposed AB-CPREs is based on standard LWE assumptions. We further introduce the directly revocable AB-CPREs, a primitive that enables a delegator to authorize and revoke his delegation of decryption rights dynamically and offers more flexible access control on externally stored encrypted data. Definition and security model of single-hop directly revocable AB-CPREs are given, and the first detailed construction of single-hop directly revocable AB-CPREs based on standard LWE assumptions is also proposed. |
| format | Article |
| id | doaj-art-bc15c078f06e43ea80f73adefd28f169 |
| institution | Kabale University |
| issn | 1751-8717 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Information Security |
| spelling | doaj-art-bc15c078f06e43ea80f73adefd28f1692025-02-03T11:53:34ZengWileyIET Information Security1751-87172024-01-01202410.1049/2024/4333883Improved AB-CPREs with Revocability and HRA Security under LWEYang Wang0Mingqiang Wang1School of MathematicsSchool of MathematicsAttribute-based conditional proxy re-encryption protocols (AB-CPREs) enable a delegator to delegate his decryption rights via different policies and grant the data owner greater flexibility in allocating their encrypted private data stored in the cloud. However, existing lattice-based AB-CPREs suffer from some drawbacks such as large parameters and weak passive securities. To the best of our knowledge, the first quantum-safe key-policy AB-CPREs with polynomially bounded parameters (for certain NC 0 circuits/policies) that is selective attribute secure against honest re-encryption attacks (HRA) is presented. The security of our proposed AB-CPREs is based on standard LWE assumptions. We further introduce the directly revocable AB-CPREs, a primitive that enables a delegator to authorize and revoke his delegation of decryption rights dynamically and offers more flexible access control on externally stored encrypted data. Definition and security model of single-hop directly revocable AB-CPREs are given, and the first detailed construction of single-hop directly revocable AB-CPREs based on standard LWE assumptions is also proposed.http://dx.doi.org/10.1049/2024/4333883 |
| spellingShingle | Yang Wang Mingqiang Wang Improved AB-CPREs with Revocability and HRA Security under LWE IET Information Security |
| title | Improved AB-CPREs with Revocability and HRA Security under LWE |
| title_full | Improved AB-CPREs with Revocability and HRA Security under LWE |
| title_fullStr | Improved AB-CPREs with Revocability and HRA Security under LWE |
| title_full_unstemmed | Improved AB-CPREs with Revocability and HRA Security under LWE |
| title_short | Improved AB-CPREs with Revocability and HRA Security under LWE |
| title_sort | improved ab cpres with revocability and hra security under lwe |
| url | http://dx.doi.org/10.1049/2024/4333883 |
| work_keys_str_mv | AT yangwang improvedabcpreswithrevocabilityandhrasecurityunderlwe AT mingqiangwang improvedabcpreswithrevocabilityandhrasecurityunderlwe |