Firmware upgrading method, device and computer readable storage medium

The invention is applicable to the technical field of data security, and provides a firmware upgrading method, a device and a computer readable storage medium. The firmware upgrading method comprisesthe following steps: performing first signature verification on a firmware upgrading packet after first signature according to a preset public key; if the first signature passes the verification, decrypting the first encrypted firmware upgrade package based on a preset decryption algorithm and a decryption key to obtain a first firmware upgrade package; wherein the first firmware upgrade package is obtained by signing an original firmware upgrade package based on a preset private key; and if the second signature of the first firmware upgrade package passes the verification, obtaining an original firmware upgrade package from the first firmware upgrade package to perform firmware upgrade operation. According to the firmware upgrading method, before and after the first encrypted firmware upgrading package is decrypt