Random number generator and random number generation method

The invention discloses a random number generator and a random number generation method. The random number generator includes: a resistive random access memory; a resistance disturbance circuit whichis coupled to resistive random access memory and configured to execute n resistance disturbance operations on the resistive random access memory to disturb the resistance value of the resistive randomaccess memory, so as to enable the resistance value of the resistive random access memory to become a disturbed resistance value, wherein each resistance disturbance operation in the n resistance disturbance operations comprises a setting operation and a resetting operation on the resistive random access memory, and n is a positive integer; and an encoding circuit which is coupled to the resistive random access memory and is configured to encode the disturbed resistance value of the resistive random access memory to generate a random number. The random number generator can realize self-calibration by utilizing the non