Application publishing method and device

Embodiments of the invention provide an application publishing method and device. The method comprises the steps of receiving user login information sent by a mobile terminal, and sending the user login information to a signature server, so that the signature server adopts the user login information for acquiring a corresponding user signature certificate from a preset certificate management server; receiving difference data fed back by the signature server, wherein the difference data is generated by carry out signature processing on a preset first original installation package by the signature server through adopting the user signature certificate; combining the difference data with a preset second original installation package to obtain a signature installation package; and sending thesignature installation package to the mobile terminal so as to install an application of the signature installation package in the mobile terminal. The method is lower in signature cost and small in data transmission quantity