5、对明文数据的相应计算。关键词:云计算;虚拟化技术;Openstack;全同态加密ITheCalculationofFullyHomomorphicEncryptiononCloudPlatformAbstractFully Homomorphic Encryption (FHE) system means that the plaintext is encrypted into ciphertext, and it allows to be carried out by arbitrary operations to get another ci
6、phertext and the result of the new ciphertext is equal to the result that operating on plaintext directly. In 2009, great progress was obtained on FHE, Gentry realized a FHE scheme on the basis of ideal lattices. With the continuous development of cloud computing, the advanta
7、ge of FHE that the ciphertext can be arbitrary carried out becomes manifest. It requires the support of an open source cloud platform to store the ciphertext encrypted by FHE on cloud platform and calculate it. Openstack is an open source project about cloud computing managem
8、ent platform, aimed at providing software for the construction and m