US 12,306,926 B2
Dynamic command protection method and dynamic command protection system by using time-vary salt data
Hui-Chi Tseng, Hsinchu (TW); He-Kai Yang, Hsinchu (TW); and Sheng-Kai Lin, Hsinchu (TW)
Assigned to MEDIATEK INC., Hsinchu (TW)
Filed by MEDIATEK INC., Hsin-Chu (TW)
Filed on Nov. 30, 2022, as Appl. No. 18/071,661.
Prior Publication US 2024/0176860 A1, May 30, 2024
Int. Cl. G06F 21/60 (2013.01); G06F 21/44 (2013.01); G06F 21/64 (2013.01)
CPC G06F 21/44 (2013.01) [G06F 21/606 (2013.01); G06F 21/64 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A dynamic command protection method comprising:
generating salt data by a physically linked device after an authentication of the physically linked device is verified;
transmitting the salt data from the physically linked device to a computer terminal;
transmitting at least one command protected by the salt data during a first time interval from the computer terminal to the physically linked device;
verifying the salt data if the at least one command is valid;
executing at least one valid command after the salt data is successfully verified;
disconnecting a link between the computer terminal and the physically linked device after the first time interval elapses; and
resetting the salt data by the physically linked device for updating the salt data after the link between the computer terminal and the physically linked device is disconnected;
wherein the salt data is bound to the physically linked device and is generated according to a time-varying value.