Method and device for reconstructing hardware secret key of memory

The embodiment of the invention provides a hardware key reconstruction method and device for a memory. When the memory reaches a preset state, the CPU reads numerical values of a plurality of fixed storage units in the memory based on preset first position information to obtain a first material sequence; and the CPU obtains stored second position information from the block chain network, reads a corresponding numerical value in the first material sequence based on the second position information to obtain a second sequence, performs error correction on the second sequence by using an error correction coding algorithm, recovers a second standard sequence, and reconstructs a hardware key of the memory based on the second standard sequence. Wherein the second position information comprises the position information of a sub-sequence, which is the same as the second standard sequence, in a material sequence in the last secret key reconstruction; the subsequence is a stable numerical value sequence obtained through selection based on the flipping probability of a plurality of numerical values in the material sequence, and the flipping probability is updated through information in last secret key reconstruction.