Hiroshi Yoshiura Takaaki Shigematsu Seiichi Susaki Tsukasa Saitoh Hisashi Toyoshima Chikako Kurita Satoru Tezuka Ryôichi Sasaki Authenticating Web-Based Virtual Shops Using Signature-Embedded Marks - A Practical Analysis. 238-248 2000 conf/spw/2000 Security Protocols Workshop http://dx.doi.org/10.1007/3-540-44810-1_31 db/conf/spw/spw2000.html#YoshiuraSSSTKTS00