Java Authentication and Authorization Service (JAAS)
Reference Guide
http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/JAASRefGuide.html#Introduction
LoginModule Developer's Guide
http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/JAASLMDevGuide.html
JAAS Authentication Tutorial
http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/tutorials/GeneralAcnOnly.html
JAAS guide
http://download.oracle.com/javase/6/docs/technotes/guides/security/
LoginModule API
http://download.oracle.com/javase/6/docs/api/javax/security/auth/spi/LoginModule.html
CallbackHandler
http://download.oracle.com/javase/6/docs/api/javax/security/auth/callback/CallbackHandler.html
Reference Guide
http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/JAASRefGuide.html#Introduction
LoginModule Developer's Guide
http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/JAASLMDevGuide.html
JAAS Authentication Tutorial
http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/tutorials/GeneralAcnOnly.html
JAAS guide
http://download.oracle.com/javase/6/docs/technotes/guides/security/
LoginModule API
http://download.oracle.com/javase/6/docs/api/javax/security/auth/spi/LoginModule.html
CallbackHandler
http://download.oracle.com/javase/6/docs/api/javax/security/auth/callback/CallbackHandler.html