NETWORK SYSTEM, AND METHODS OF ENCRYPTING DATA, DECRYPTING ENCRYPTED DATA IN THE SAME

摘要

Various aspects of this disclosure provide a method of encrypting data in a network system. The method may include generating within a trusted network of the network system an associated private key based on an attribute associated with an user, a homomorphically encrypted associated private key based on the associated private key via homomorphic encryption, and a homomorphic key pair. The method may also include transmitting the homomorphically encrypted associated private key from the trusted network to a non-trusted network of the network system. The method may further include generating within the trusted network encrypted data based on said data, and a homomorphically and attribute based encrypted control key. The method may further include transmitting the encrypted data, and the homomorphically and attribute based encrypted control key, from the trusted network to the non-trusted network.