While FusionSys HES (Hierarchical Encryption System) belongs to a group of common key encryption systems, it has a striking feature:Master keys exist.Let's say there are 3 people and they have keys with different degrees of strength.The person with the strongest key can decrypt all encrypted data while the person with the weakest key can only decrypt a small set of the data.Moreover, the person with the intermediate key can decrypt a subset of the data. By using HES, one can introduce various kinds of hierarchical structure in Web pages. This program is the FusionSys HES decoder plugin for Internet Explorer. All you have to do is just put it into a folder (c:\Program Files\Internet Explorer\plugins). Please visit http://fusionsys.com/ and see for yourself!!

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