摘要：As cloud services evolve, the issue of how to preserve the privacy of data stored in cloud servers isalso getting attention. Homomorphic Encryption is one of the most powerful solutions for cloud security,but it is not being applied to the real cloud environment due to the inherent limitations which it has. Thebiggest limitation of Homomorphic Encryption is that noise is accumulated in ciphertext each time anoperation between ciphertexts is performed. Also, Homomorphic Encryption supports only simple ciphertextoperations such as addition and multiplication between integers are possible. Although there have beenmany studies to overcome its limitations, most of them can be used only under certain conditions, but theyhave not solved fundamental problems. In this paper, we analyze the limitations of existing HomomorphicEncryption algorithms, and construct a homomorphic addition operation that can be used universally usinglogic circuit operations.
