LICENSE

LICENSE

Copyright (c) 2020, NIC Chile Research Labs (NIC Labs), Universidad de Chile. 
All rights reserved.

1.- The process of signing documents using threshold cryptography is protected
under the patent "System and method for secure electronic communications 
through hardware-based security threshold cryptography" 10735188 (USA, 2020) 
and 2015003766 (Chile, 2015). For any commercial use of such technology please 
refer to the Vice Presidency of Research and Development of Universidad de 
Chile at https://uchile.cl/u5077

2.- NIC Labs has a rich history of collaboration with the Open Source Community 
and the development of the DNS infrastructure.  Therefore, we provide the source
code of our implementation of the distributed Hardware Security Module (dHSM), 
formerly Threshold Cryptography Hardware Security Module, aiming to increase the
alternatives to DNS admins for DNSSEC procedures.

3.- Also, knowing that some parts of our code are not related particularly to 
the procedure claimed in 1, we decide to extend the permission granted in 2. 
Permission is hereby granted, free of charge, to any person or organization 
obtaining a copy of the software and accompanying documentation covered by this 
license (the "Software") to use, reproduce, display, distribute, execute, and 
transmit the Software, parts of the Software, and to prepare derivative works of
the Software, and to permit third-parties to whom the Software is furnished to 
do  so, all subject to the following:

3.1.- The use of the Software (or the parts of this Software used in derivative 
works) does not infringe the patent signaled in 1.

3.2.- The use of the Software (or the parts of this Software used in derivative 
works) is used on any Open Source Software Implementation.  Where “Open Source 
Software” means software whose source code is published and made available for 
inspection and use by anyone because either (a) the source code is subject to a 
license that permits recipients to copy, modify, and distribute the source code 
without payment of fees or royalties, or (b) the source code is in the public 
domain, including code released for public use through a CC0 waiver. All 
licenses certified by the Open Source Initiative at opensource.org as of 
January 5, 2021 and all Creative Commons licenses identified on the 
creativecommons.org website as of January 5, 2021, including the Public License 
Fallback of the CC0 waiver, satisfy these requirements for the purposes of this 
license.

3.3.- If you or your affiliates institute patent litigation (including, but not 
limited to, a cross-claim or counterclaim in a lawsuit) against any entity 
alleging that any use authorized by this license infringes another patent, then 
any rights granted to you under this license automatically terminate as of the 
date such litigation is filed.

3.4.- The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer, must be 
included in all copies of the Software, in whole or in part, and all derivative 
works of the Software, unless such copies or derivative works are solely in the 
form of machine-executable object code generated by a source language processor.

4.- DISCLAIMER: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. 
IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE 
LIABLE FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR 
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 
OR OTHER DEALINGS IN THE SOFTWARE.