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Title:
Cryptanalysis of a Homomorphic Encryption Scheme
Authors: Sonia Bogos, John Gaspoz, Serge Vaudenay
Abstract:Homomorphic encryption allows to make specific operations on private data which stays encrypted. While applications such as cloud computing require to have a practical solution, the encryption scheme must be secure. In this article, we detail and analyze in-depth the homomorphic encryption scheme proposed by Zhou and Wornell. From the analysis of the encryption scheme, we are able to mount three attacks. The first attack enables to recover a secret plaintext message broadcasted to multiple users. The second attack performs a chosen ciphertext key recovery attack and it was implemented and verified. The last attack is a related chosen plaintext decryption attack.
ePrint: https://eprint.iacr.org/2016/775
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