An encrypted file printing system includes: a client terminal configured to generate a print file; an authorization management server configured to manage authorization of the print file; and an image forming apparatus configured to perform printing of the print file, the client terminal, the authorization management server, and the image forming apparatus being connected by a communication network, wherein the authorization management server includes: a key generating unit; and a decrypting unit, the client terminal includes: an encrypting unit; and a print instructing unit, the image forming apparatus includes: a decrypting unit; a rasterizing unit; a memory; and a control unit, and the control unit includes: a complexity calculating unit; a processing time calculating unit configured to calculate a first processing time in a first processing mode and a second processing time in a second processing mode; and a decryption destination determining unit.