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List of files:
	abenc_rw13.py  --->  RW'13 scheme
	abenc_zxing.py --->  Our Scheme
	time_stat.sh   --->  shell script for collecting running time
	cal_time_avg.py ---> python script for calculating average running time


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How to use:
	Step 1: run the time_stat.sh.
		syntax: time_stat.sh <the scheme python script> <round of execution>
		the output of Step 1 is sent to the console defaultly, you can redirect it to some files.
	Step 2: run cal_time_avg.py 
		syntax: python cal_time_avg.py <output of Step 1>
		the output of Step 2 is sent to the console defaultly


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