Blog
Articles, tutorials, and field notes on identity, integration, API management, and application security — spanning nearly two decades of hands-on work.
JVM process Virtual Memory Usage (Resident Set Size) On A Linux 2.6.25 Kernel
This article expands on the previous Virtual Memory post by exploring Resident Set Size growth while running a Java program that will consume all available Java Heap memory. Four different JVM implementations are used to compare results of these experiments. These JVMs come from two different…
Google Browser Security Handbook
Google has released a Browser Security Handbook online. It can be found here.
Virtual Memory — Linux
It has been a couple of weeks since the last article was published. Recently, I had to dig into Virtual Memory on AIX to work through some issues. I realized there were several details I needed to explore further to understand Virtual Memory implementations. In particular, the implementation…
Dumping the contents of a JAAS Subject
In the last article, JAAS was introduced. An authenticated calling-entity (perhaps a user), has a JAAS Subject. This JAAS Subject contains some combination of Principals, Public Credentials, and Private Credentials. It can be very helpful to dump the contents of this JAAS Subject for debugging…
JAAS Authentication — An Introduction
This article introduces JAAS authentication via a relatively simple example. The example presented here is based upon the Sun tutorial of the same subject. The thinkmiddleware.com example extends the tutorial to use LDAP to authenticate users.
An Openldap Directory Server
The recent JNDI article and an upcoming JAAS article require an LDAP server. This tutorial will walk through the basic details of reproducing the Openldap Server used in these two articles.
JNDI — Java Naming & Directory Interface
While researching an upcoming JAAS article, the decision was made to use JNDI to interact with the Openldap server that was stored user information. JNDI is used extensively in the J2EE landscape; so, exploring JNDI separately from JAAS seemed in order.
Ant — Build Control
I’ve mentioned that for larger projects/examples on thinkmiddleware.com, Ant would be used. The Java Security Manager article was the first time it was used. Although, the full details of the source code were not included, Ant was used.
The Java Security Manager
In the last post, the Java Standard Edition and Java Enterprise Edition security features were introduced. This is the second in a series of articles that introduces each Java security feature in depth. This article introduces the Java Security Manager and the sandbox it creates for a Java…
Java Security — The Low-Level details To J2EE Security–And, Beyond
While researching details for a Java Security Manager article, it became obvious that I didn’t understand the mappings of all the different Java, security-related specifications to the technologies and acronyms I knew. Thus, was the beginning of this article. Below each security-related feature in…
Java Networking API vs. The C library networking API
The original article is located here. In this article, I described what was involved in writing a server program in the C language. The details are not important, but I wanted to compare the details that are exposed in this relatively simple C network programming example with the equivalent Java…
Concurrency And Server-Side Networking APIs — Part 4
The original article can be found here. Introduction