Circuit and method for generating random number

摘要

A circuit and a method for generating a random number are provided. The circuit for generating the random number includes an analog-to-digital converter and a controller. The analog-to-digital converter sequentially generates a plurality of digital data in response to an analog signal. The controller utilizes an estimation procedure to sequentially analyze a variation trend of the plurality of digital data in a time sequence or extract components of the plurality of digital data within a preset frequency band. In addition, the controller generates a true random number based on a result of the estimation procedure.

主权项

1. A method for generating a random number, adapted for an electronic device, the method for generating a random number, comprising:
using an analog signal inherent in the electronic device to cause an analog-to-digital converter to sequentially generate a plurality of digital data, wherein the analog-to-digital converter is shared in the electronic device; sequentially analyzing a variation trend of the plurality of digital data in a time sequence by using an estimation procedure or sequentially extracting components of the plurality of digital data within a preset frequency band by using the estimation procedure; and generating a true random number based on a result of the estimation procedure.