The Paillier's Cryptosystem and Some Variants Revisited
The Paillier's Cryptosystem and Some Variants Revisited
复制标题
重新审视 Paillier 的密码系统和一些变体
DOI:
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发表时间:
2015-11
期刊:
影响因子:
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通讯作者:
Liu Lihua
中科院分区:
文献类型:
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作者:
Cao Zhengjun;Liu Lihua
At Eurocrypt'99, Paillier presented a public-key cryptosystem based on a novel computational problem. It has interested many researchers because it was additively homomorphic. In this paper, we show that there is a big difference between the original Paillier's encryption and some variants. The Paillier's encryption can be naturally transformed into a signature scheme but these variants miss the feature. In particular, we simplify the alternative decryption procedure of Bresson-Catalano-Pointcheval encryption scheme proposed at Asiacrypt'03. The new version is more applicable to cloud computing because of its double trapdoor decryption mechanism and its flexibility to be integrated into other cryptographic schemes. It captures a new feature that its two groups of secret keys can be distributed to different users so as to enhance the robustness of key management.
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