A method for the conversion agents, devices and systems

The present invention discloses a method of performing proxy transformation between the user and the server, comprising: selecting a first proxy relationship between the target user and the first user from the proxy relationship library; selecting a random value, according to the random value and the relationship between the first agent, generates a second proxy relationship; encrypted original information based on the first user's public key and the random value, to obtain the encrypted information, the encrypted information and the second transmitted to the server agent relationship, so that the server proxy transformation of the encrypted information according to the second proxy relationship to obtain the transformed information. The method of the present invention the proxy transformation solve safety problems server without the user agent allows for transformation. The present invention also discloses a user terminal and a system for performing proxy transformation.