tree 78df68778a0730e5014fec1847c2410a01245eb1
parent 1e418f242242b2f52fbadf38ddd376d73288ed2c
author Zhiyi Zhang <zhiyi@cs.ucla.edu> 1605845003 -0800
committer Zhiyi Zhang <zhiyi@cs.ucla.edu> 1605845003 -0800

rename identity challenge dir to challenge

Change-Id: Ieb89704404dae2086bd83987624670432bb69663