ENCRYPTION METHOD FOR CLOUD SERVICE, AND CLOUD SYSTEM FOR PROVIDING ENCRYPTION METHOD BASED ON USER EQUIPMENT

摘要

The present invention relates to an encryption method for a cloud service, which makes data not exposed to a manager who manages a cloud service. The encryption method for a cloud service comprises the steps of: forming, by a first computer device of a user and one or more second computer devices of the user, an encryption group over a network; transmitting, by the first computer device, a group key to the one or more second computer devices; generating, by an encryption computer device which is one of the one or more second computer devices, a data encryption key; encrypting, by the encryption computer device, data by using the data encryption key, and encrypting, by the encryption computer device, the data encryption key by using the group key; and transmitting, by the encryption computer device, the encrypted data and the encrypted data encryption key to a cloud server over the network.;COPYRIGHT KIPO 2016