A digital certificate management method, comprising: negotiating, by a digital certificate requesting device, with a digital certificate issuing device, establishment of a secure data channel using an authorization code obtained from the digital certificate issuing device and generating a security key based on said authorization code, wherein the security key at least comprises a data communication key; transmitting, by the digital certificate requesting device, a digital certificate management request message to the digital certificate issuing device using the secure data channel, the digital certificate management request message being encrypted via the data communication key; receiving, by the digital certificate issuing device, the digital certificate management request message and transmitting a digital certificate management verification request message to the digital certificate requesting device using the secure data channel, the digital certificate management verification request message being encrypted via the data communication key; receiving, by the digital certificate requesting device, the digital certificate management verification request message and transmitting a digital certificate management verification response message to the digital certificate issuing device using the secure data channel, the digital certificate management verification response message being encrypted via the data communication key; receiving, by the digital certificate issuing device, the digital certificate management verification response message and transmitting S a digital certificate management response message to the digital certificate requesting device using the secure data channel, the digital certificate management response message being encrypted via the data communication key; receiving, by the digital certificate requesting device, the digital certificate management response message and transmitting a digital certificate management confirmation message to the digital certificate issuing device using the secure data channel, the digital certificate management confirmation message being encrypted via the data communication key; and receiving and processing, by the digital certificate issuing device, the digital certificate management confirmation message. negotiating, by a digital certificate requesting device, with a digital certificate issuing device, establishment of a secure data channel using an authorization code obtained from the digital certificate issuing device and generating a security key based on said authorization code, wherein the security key at least comprises a data communication key; transmitting, by the digital certificate requesting device, a digital certificate management request message to the digital certificate issuing device using the secure data channel, the digital certificate management request message being encrypted via the data communication key; receiving, by the digital certificate issuing device, the digital certificate management request message and transmitting a digital certificate management verification request message to the digital certificate requesting device using the secure data channel, the digital certificate management verification request message being encrypted via the data communication key; receiving, by the digital certificate requesting device, the digital certificate management verification request message and transmitting a digital certificate management verification response message to the digital certificate issuing device using the secure data channel, the digital certificate management verification response message being encrypted via the data communication key; receiving, by the digital certificate issuing device, the digital certificate management verification response message and transmitting S a digital certificate management response message to the digital certificate requesting device using the secure data channel, the digital certificate management response message being encrypted via the data communication key; receiving, by the digital certificate requesting device, the digital certificate management response message and transmitting a digital certificate management confirmation message to the digital certificate issuing device using the secure data channel, the digital certificate management confirmation message being encrypted via the data communication key; and receiving and processing, by the digital certificate issuing device, the digital certificate management confirmation message.