Links
Jasypt is a library which allows the developer to add basic encryption capabilities to projects with minimum effort, and without the need of having deep knowledge on how cryptography works.
Articles
Securing Java applications with Acegi, Part 1: Architectural overview and security filters. Here is a copy of the article:
../../misc/howto/acegi/Securing-Java-applications-with-Acegi-Part-1.pdf
…and the source code:
../../misc/howto/acegi/j-acegi1.zip