Yongxin Zhou 0002 Alec Main Yuan Xiang Gu Harold Johnson Information Hiding in Software with Mixed Boolean-Arithmetic Transforms. 61-75 2007 conf/wisa/2007 WISA http://dx.doi.org/10.1007/978-3-540-77535-5_5 db/conf/wisa/wisa2007.html#ZhouMGJ07