Yes, you are free to download and use the end-to-end encryption program which consist of the applet and the server side java program plus one key-pair.

Please read the following license agreement.

=======================================================
SOFTWARE LICENSE
=======================================================
Copyright (C) 2003 Polyarista
All Rights Reserved

You should carefully read the following terms and
conditions before using this software. Your use of this
software indicates your acceptance of this license
agreement and warranty.


=======================================================
 License Agreement
=======================================================

You must not defeat, or try to defeat, messages in the
Software which encourage users to register; modify or
prepare derivative works of the Software; or reverse
engineer, decompile or disassemble the Software.


=======================================================
 Distribution
=======================================================
You are hereby granted the right

- to make as many copies of this software and its
  documentation as you wish;
- give exact copies (including all files) of the
  original version to anyone;
- and distribute the software and documentation in its
  unmodified form via electronic means.

There is no charge for any of the above.

You are specifically prohibited from charging, or
requesting donations, for any such copies.

The following may distribute this software,
completely unaltered, without further permission:
- Internet Free Software sites

Any distribution satisfying all the
distribution requirements expressed in that data record
is hereby authorized.

Permission to distribute this software is not
transferable, assignable, saleable, or franchisable.
Each vendor wishing to distribute the package must
independently satisfy the terms of this limited
distribution license.

=======================================================
 Legal Disclaimer
=======================================================
THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
OF THE SOFTWARE IS WITH YOU. SHOULD THE SOFTWARE
PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
NECESSARY SERVICING, REPAIR OR CORRECTION.

IN NO EVENT WILL THE AUTHOR OR ANY OTHER PARTY
WHO MAY HAVE DISTRIBUTED THE SOFTWARE AS
PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
INABILITY TO USE THE SOFTWARE (INCLUDING BUT NOT
LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE SOFTWARE TO
OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH
HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.

TO THE AUTHOR'S KNOWLEDGE NO TRADEMARK OR PATENT
INFRINGEMENT EXISTS IN THIS DOCUMENT OR IN THE
PROGRAM DISTRIBUTION; ANY SUCH INFRINGEMENT IS
PURELY UNINTENTIONAL.

I AGREE