SECURE BOOT METHOD AND DEVICE

Provided are a secure boot method and device. The method comprises: booting a boot image in a chain in which an upper boot item reads its lower boot item; calculating a secure check value of the boot image; reading a standard check value corresponding to the boot image stored in a secure chip by way of unauthorized reading; and comparing the secure check value with the standard check value, if the secure check value matches the standard check value, booting the lower boot item, and if the secure check value does not match the standard check value, stopping the booting. By means of the boot method, the technical problem in the relevant art of low booting efficiency caused by the limitation on the length of decrypted data due to the use of a decryption mechanism is avoided. At the same time, in the secure boot method provided herein, it only needs to update the standard check value of a boot item, which needs to be updated, into the secure chip when the system is updated, without affecting other boot items whic