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篇名 |
Lattice-based Fuzzy Conditional Proxy Re-encryption
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並列篇名 | Lattice-based Fuzzy Conditional Proxy Re-encryption |
作者 | BaoHong Li、JieFei Xu、YanZhi Liu |
英文摘要 | As an extension to conditional proxy re-encryption, fuzzy conditional proxy re-encryption allows for a proxy to re-encrypt a ciphertext only if it satisfies some t-outof- d threshold condition. Therefore, it is more desirable in some applications where fine-grained control of the decryption delegation is required. In this paper, we construct the first lattice-based fuzzy conditional proxy re-encryption scheme as a post-quantum alternative to this primitive. In our construction, original ciphertexts and re-encryption ciphertexts have the same form, thus only one decryption algorithm is needed for both kinds of ciphertexts. We formalize its security model and prove that it is selective secure under the LWE assumption. |
起訖頁 | 1379-1385 |
關鍵詞 | Proxy re-encryption、Lattice-based cryptography、Fine-grained control、Decryption delegation |
刊名 | 網際網路技術學刊 |
期數 | 201909 (20:5期) |
出版單位 | 台灣學術網路管理委員會 |
DOI |
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