Browsing by Author "Wang Chi-Wei"

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DECOUPLED METHOD FOR TRACKING INFORMATION FLOW AND COMPUTER SYSTEM THEREOF
(2013-07-18)
Wang Chi-Wei
;
Shieh Shiuh-Pyng
;
Liu Yen-Ju
A computer system and a method for tracking information flow are provided. The computer system divides an information flow tracking task into two decoupled tasks executed by two procedures. The first procedure emulates execution of instructions and divides the instructions into code blocks according to an instruction executing sequence. The first procedure translates the instructions of the code blocks into information flow codes and transmits them to the second procedure. The first procedure further translates the instructions into dynamic emulation instructions and executes the dynamic emulation instructions to generate addressing results of the dynamic addressing instructions. The second procedure executes the information flow codes according to the addressing results to emulate the instructions of the code blocks. Moreover, the method also tries to reduce the amount of data transmission between the two procedures when the first procedure executes the emulation task. Therefore, the efficiency of tracking information flow is enhanced.
METHOD FOR DETECTING A POSSIBILITY OF AN UNAUTHORIZED TRANSMISSION OF A SPECIFIC DATUM
(2014-03-27)
Wang Chi-Wei
;
Shieh Shiuhpyng
;
Chang Chia-Huei
A tracing device for detecting whether a specific attribute datum has a possibility of being stolen is provided. The tracing device includes a label map and a first processing device, wherein the label map has a specific label attached on the specific attribute datum and a buffer region, and the first processing device is coupled to the label map and determines whether there is the specific label in the buffer region.