19 1 13 1
ebay ebay Yahoo! 2
ebay Yahoo! BtoB CtoC 1990 Yahoo! 1999 9 ( 3
ebay Yahoo ID 4
ebay ebay 2001 ebay ebay ebay 380 5
1998 ebay ebay ebay B2C e P2P ebay P2P ebay ebay ebay 1999 200 6
ebay ebay ebay ebay ebay ebay 2000 ebay ebay Yahoo! Ameba 7
Yahoo! 1999 640 2005 6615 Yahoo!Yahoo! Yahoo! Yahoo! 24 8
ID 2006 1802 35 Yahoo! 9
Yahoo! ID aa_netauctest ID aa_netauctest@yahoo.co.jpyahoo! aa_netauctest@yahoo.co.jp Yahoo! ID Yahoo! IDyahoo.co.jp Yahoo! Yahoo! Yahoo! Yahoo! Yahoo! Phishing 10
50,000 0 40,000 40,000 50,000 50,000-40000 = 10,000 10% Yahoo! 18 1 11 Yahoo! Windows XP Professional37 11
ACCS 3 ACCS 3 Yahoo! ID PC ID ID ID ID ID 15 12
Yahoo URL All About ID Q&A 13
2 1 Yahoo! JAPAN Yahoo! Yahoo! 30 6 Yahoo! 14
Yahoo! ATM 15
C-NEWS 2004 Web 16
Yahoo! C-NEWS 2004 Yahoo!96.2 70.8 69.1 17
ID 18
150 100 50 60 500 50 550 80 550 170 19
30 ebay 2001 1999 1999 2001 2000 e-2000 DE http://www.keishicho.metro.tokyo.jp/kouhoushi/no7/net/net.htm All About http://allabout.co.jp/internet/netauction/ ACCS http://www2.accsjp.or.jp/news/news060111.html ITpro Security ID http://itpro.nikkeibp.co.jp/article/news/20060728/244627/ http://www.meti.go.jp/policy/consumer/auction_id/main.htm Watchi http://internet.watch.impress.co.jp/cda/news/2006/11/13/13921.html 20