The invention relates to a computer permission control method based on a mobile dynamic 
password. The computer permission control method based on the mobile dynamic 
password comprises the following steps: generating a private key and a public key by adopting 
encryption algorithm at an 
personal computer (PC) end and sending the public key to a 
mobile end; encrypting a PC management 
password, using time and permission level information which are stored at the 
mobile end in advance by adopting the public key after the 
mobile end receives the public key, generating a 
ciphertext string, and then sending the 
ciphertext string to the PC end; deciphering the 
ciphertext string by adopting the private key after the PC end receives the ciphertext string, getting the PC management password, the using time and the permission level information; and conducting a password 
authentication with the PC end by using the PC management password information. When the PC end passes the password 
authentication, computer permission is opened according to the using time and the permission level information. When the PC end does not pass the password 
authentication, the computer permission ends. Compared with the prior art, the computer permission control method based on the mobile dynamic password has the advantages of being capable of achieving a 
remote control of the using time and the permission of a computer by a mobile, convenient to use, good in safety and the like.