Simple encryption method

The invention discloses a simple encryption method. An upper computer sends a command for reading related information required by equipment encryption to equipment; a microcontroller of the equipment disperses a unique ID array of the microcontroller into a long random number array 1, and uploads a final array to an upper computer; the upper computer restores the unique ID array of the microcontroller; the upper computer exchanges the byte sequence of the unique ID array to form a new ID array, calculates a secret key array 1, and disperses the secret key array 1 into the random number array 2 to form an encrypted data array; the upper computer sends the encrypted data array to the device microcontroller, and the microcontroller calculates a secret key array 2 and compares the secret key array 2 with the secret key array 1. According to the method, multiple long random number arrays are used as interference data, so that the cracking difficulty is greatly increased; the encrypted data array is stored in the a