Xun Yi. Directed Transitive Signature Scheme. In Masayuki Abe, editor, Topics in Cryptology - CT-RSA 2007, The Cryptographers Track at the RSA Conference 2007, San Francisco, CA, USA, February 5-9, 2007, Proceedings. Volume 4377 of Lecture Notes in Computer Science, pages 129-144, Springer, 2007. [doi]
Abstract is missing.