Password card, root key protection method thereof and computer readable storage medium

The invention relates to the technical field of information security, and discloses a cipher card and a root key protection method thereof, and a computer readable storage medium, the cipher card comprises a security chip and a clock chip, and the root key protection method comprises the following steps: generating a root key and a first root key component in response to a root key generation instruction; encrypting the root key by using the first root key component to obtain a second root key component; the second root key component is stored in a protection area of the security chip, the first root key component is stored in an RAM area of the clock chip, and when the password card is illegally operated, the RAM area loses power, so that the first root key component disappears. According to the method, the root key can be prevented from being illegally acquired, the security of the root key is ensured, and the security of the password card is effectively improved. 本发明涉及信息安全技术领域，且公开了一种密码卡及其根密钥保护方法、计算机可读存储介质，