Authenticating Web-Based Virtual Shops Using Signature-Embedded Marks - A Practical Analysis. - Hiroshi Yoshiura; Takaaki Shigematsu; Seiichi Susaki; Tsukasa Saitoh; Hisashi Toyoshima; Chikako Kurita; Satoru Tezuka; Ryôichi Sasaki (Security Protocols Workshop, 2000)