End user needs latest Java version (JRE) installed and a modern web browser to use HyperDoc Online application. Latest Java version can be downloaded from here.

The JRE relies on periodic checks with an Oracle Server to determine if the JRE is still considered up-to-date with all the available security fixes (above the security baseline). In the past, if the JRE was unable to contact the Oracle Server, the JRE continued to behave as though it is the most recent version with regard to security for an indefinite period.

To avoid this problem, a secondary mechanism that does not rely on external communication has been added to the JDK 7u10 release. From the 7u10 release onwards, all JREs contain a hard-coded expiration date. The expiration date is calculated to end after the scheduled release of the next Critical Patch Update.

JREs that are unable to contact Oracle Servers for an extended period of time now offer additional protection after a reasonable period and do not continue to behave as if they were up-to-date with regard to security fixes.

More information can be found here: Java Expiration Date.

It is important to understand, that possible security threat only exists when using Java Applets that come from unknown source. It is perfectly safe to use HyperDoc software that will not impose any security threat to client computer, independently from Java version used. All Tessel Java applets have a valid digital signature that ensures their origin. It is important to check if the applet is signed by "Tessel Systems AB", check "Do not show this again for apps from the publisher and location above" and select Run. Otherwise applets will be blocked and a "critical failure" message will be shown.

Users should upgrade Java version regularly (use of auto-updates is recommended) to ensure their security and uninterrupted functioning of HyperDoc Online.

Possible ways of overcoming problems with using outdated Java version

Warning

important Please remember that tips described below may lower your computer/network security. The best way to keep it most safe is to have latest Java version installed.

If you want to use Java version that have expired (that does not work with HyperDoc Online) you can try methods described below.

Changing Java Security level in Java Control Panel to the lowest position:

Medium is not available to select since Java 8 update 45.

Adding your HyperDoc Online site to Exception Site List (from Java Control Panel - Security tab) - more details can be found on Oracle website:

In Trusted zone add your HyperDoc Online url to trusted sites list (this zone by default have lower security than other zones).

Using Deployment Rule Sets (only for standalone HyperDoc Online installations).

Those are administrative action than can be done by System administrators to whitelist the RIA and javascript domains.