Lucid System Requirements

Option 1: Key Server

Accessing the key through the Lucid Key Server is the default option.


  • It is fully web-based and requires no special software or add-ons.
  • You do not have to wait for entire key to load.
  • It can be used on mobile devices such as the iPad, iPhone, etc.


  • The 4x4 viewing grid is not size adjustable.
  • Because the entire key is not loaded, users may experience latency between character selections.

If the key does not load at first, please refresh the page.

Begin Key Server

Option 2: Java Key


  • The key is pre-loaded, eliminating latency between character selections.
  • The 4x4 viewing grid is size adjustable.


  • Entire key must be loaded before it can be used.
  • System requirements are more restrictive (see below).
  • Java applets may be blocked as active content by certain organizations.
  • Java applet will not run on many mobile devices.

Operating System: Windows 2000/XP/Vista, Mac OSX 10.4 or greater, Linux (that supports J2RE), Solaris 7-10. (The key will run on Windows 98/ME/NT4 but these platforms are no longer supported.)

System Memory: 256MB RAM (512MB or greater recommended).

Web browser: Java-enabled web browser such as Internet Explorer, Firefox, Chrome, or Safari.

NOTE: Web pages such as fact sheets attached to items in Lucid keys may be considered pop-ups by certain browsers (such as Internet Explorer [IE]). If your browser blocks these pop-ups, in your browser's Internet settings you should allow pop-ups for this tool. Additionally, Internet Explorer may block "active content" on web pages or interactive keys. To allow active content: in Internet Explorer under Tools, Internet Options, Advanced tab, Security category, the box next to the setting "Allow active content to run in files on My Computer" should be checked. Additionally, certain settings under Tools, Internet Options, Security, Custom level, ActiveX controls and plug-ins, may need to be changed.

The Lucid3 interactive key will run embedded within a web browser as a Java Applet Player. Java Runtime Environment (JRE) version 1.4.2 (1.5 or greater recommended) must be installed on your computer for the Lucid3 Applet Player to run successfully.

If in the box above you see text that says your Java status is version 1.4.2 (or greater) from Sun Microsystems Inc., and your computer meets the Lucid3 system requirements, you may open a key:

Begin Java Key

Java information

If you don't see the necessary text in the box above, if the version number displayed is less than 1.4.2, or you receive an error message stating "Java is an unknown command", you can download and install (make sure to uninstall old versions) the latest Java Runtime Environment version from the Java web site at

Note: Some Java versions greater than 1.4.2 may have bugs that affect operation of the interactive key. Bugs can usually be resolved by downloading the latest Java Runtime Environment version from the Java web site. Also, be aware that the JRE is continually being updated for compatibility with operating system updates. It's generally a good idea to have the latest JRE version installed.

You can verify your Java installation status by doing the following:


Type "java -version" at a Command Prompt window. You can get to the Command Prompt window by either going to Run from the Start button and typing "cmd" or by selecting the Command Prompt menu option from Accessories.

Mac OSX, Linux, Unix and other platforms

Type "java -version" at a terminal window.

Note to Macintosh users

OSX comes pre-installed with the JRE and is accessible using Safari. Ensure you have the latest version of JRE by running the software update utility. Internet Explorer version 5.2.3, which is the last version of IE for the Mac, does not support JRE, nor does Opera., however, has opted (at least since February 2007) to include the Java Embedding Plugin by default in all of its products (Firefox, Mozilla, or Camino browsers). This will enable them to access JRE and run the key. However, if you require the Java Embedding Plugin, see the links below for information regarding installation, compatibility and updates for the plugin. The Java Embedding Plugin does not work with Explorer or Opera.

Information and Installation instructions for the Java Embedding Plugin for Mac OSX can be found at:

To download the plugin directly, go to the Java Embedding Plugin Summary at:

If Java version 1.4.2 or greater is now installed on your computer, you may open the key:

Begin Java Key


Lucid3 is software for creating and using interactive identification keys. Lucid is developed by QAAFI Biological Information Technology at the University of Queensland in Australia. Visit the Lucidcentral web site for more information on Lucid3.