OpenID
さいきんにんき
http://openid.net/
http://www.theserverside.com/tt/articles/article.tss?l=OpenID
http://code.google.com/p/openid4java/
http://code.sxip.com/
http://code.sxip.com/openid4java/
TrustBearer Labs Releases Secure OpenID Service
http://www.prleap.com/pr/114299/
https://openid.trustbearer.com/
HWトークンが使える