An optimistic fair exchange protocol and its security in the universal composability framework.

Yusuke Okada Yoshifumi Manabe Tatsuaki Okamoto An optimistic fair exchange protocol and its security in the universal composability framework. 70-77 2008 1 IJACT 1 http://www.inderscience.com/filter.php?aid=17052 db/journals/ijact/ijact1.html#OkadaMO08