- 期刊
An Improvement of One Anonymous Identity-based Encryption Scheme
摘要
At PKC'09, Seo et al. proposed an anonymous identity-based encryption scheme. The cipher- text consists of (C_1,C_2,C_3,C_4), where C_1 is the blinded message, C_4 is the blinded identity. Both C_2 and C_3 are used as decrypting helpers. To prove its security, they defined five games and introduced a strong simulator who was able to select different Setups for those games. In this paper, we improve the scheme by removing one decrypting helper and the strong simulator. We show its security under the ℓ-computational Diffie-Hellman assumption with a normal simulator who requires only a unique Setup. The techniques developed in this paper are helpful to optimize other cryptographic protocols.
延伸閱讀
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- Luo, S., & Hu, N. (2013). On the Anonymity of Identity-Based Encryption. Journal of Applied Mathematics, 2013(), 37-45-104. https://doi.org/10.1155/2013/217480
- 林連源（2006）。A Study of Fuzzy-based Encryption and Decryption〔碩士論文，國立臺灣師範大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0021-2304200714205544
- Liu, L., & Ye, J. (2017). A Homomorphic Universal Re-encryptor for Identity-based Encryption. International Journal of Network Security, 19(1), 11-19. https://doi.org/10.6633/IJNS.201701.19(1).02
- Liu, L., & Ye, J. (2016). A Homomorphic Universal Re-encryptor for Identity-based Encryption. International Journal of Network Security, (), 11-19. https://doi.org/10.6633/IJNS.201701.19(1).02