We present a new CAPTCHA which is based on identifying an image's upright orientation. This task requires analysis of the often complex contents of an image, a task which hum...
Unicode is becoming a dominant character representation format for information processing. This presents a very dangerous usability and security problem for many applications. The...
Anthony Y. Fu, Xiaotie Deng, Liu Wenyin, Greg Litt...
Several off-the-shelf products enable network operators to enforce usage restrictions by actively terminating connections when deemed undesirable. While the spectrum of their appl...
Secure, fault-tolerant distributed systems are difficult to build, to validate, and to operate. Conservative design for such systems dictates that their security and fault toleran...