—Captchas are designed to be easy for humans but hard for machines. However, most recent research has focused only on making them hard for machines. In this paper, we present wha...
Elie Bursztein, Steven Bethard, Celine Fabry, John...
Abstract. Cryptographic protocols are useful for engineering trust in transactions. There are several languages for describing these protocols, but these tend to capture the commun...
Abstract. We introduce a novel remotely-mounted attack that can expose the network identity of an anonymous client, hidden service, and anonymizing proxies. To achieve this, we emp...
"One Click Fraud" is an online confidence scam that has been plaguing an increasing number of Japanese Internet users, in spite of new laws and the mobilization of polic...
Nicolas Christin, Sally S. Yanagihara, Keisuke Kam...
Little research exists on one of the most common, oldest, and most utilized forms of online social geographic information: the “location” field found in most virtual community...