Memory integrity protection method based on write counter

The present invention relates to the field of memory integrity verification, in particular to a memory integrity protection method based on a write counter. According to the memory integrity protection method based on the write counter, two types of data blocks are provided, the corresponding write counter is provided for one type of data blocks and is used for recording the number of writing times of a processor to an address memory block, the write counter is stored in a specific write counter cache in a processor chip, and the write counter cache is located on the same level as an L2 cache; and in the write counter cache, a private key is also assigned for the data blocks. Compared to adoption of a hash check tree, adoption of a message verification code for performing integrity verification has the largest advantage of much lower verification cost. When the integrity verification is performed by using the hash check tree, iteration needs to be carried out from a leaf node to a root node to calculate a hash value; but for the message verification code, MAC calculation only needs to be carried out for once, i.e. only one layer of operations in the hash tree needs to be performed.