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Hex Five Security is a Commercial Open Source Company. All our software is available on GitHub free of charge for non-commercial use at

The Multi Zone API definition is free as in “free speech” and free as in “free lunch”. It is open sourced under ISC permissive license free of charge for “any use”. It is maintained by Hex Five and we welcome everyone’s direct contributions in the form of a GitHub pull request. Everyone can write their own implementations of the free and open API. We are strong supporter of the commercial open source movement and  actively promote the development of a global vibrant community!

The MultiZone® Security API commercial implementation developed by Hex Five includes MultiZone® Configurator, MultiZone® nanoKernel, and MultiZone® Communications. These components are distributed as part of the MultiZone Security SDK, free of charge for evaluation only. Commercial use is restricted and requires Hex Five commercial license, sometime included with the hardware itself, but never royalties – as we hate them as much as you do! Hex Five’s core components are suitable for formal verification and everyone is welcome to perform formal verification and to publish models and results. In addition, all Hex Five’s source code is always available to commercial licensees for inspection and detailed code review in a clean room environment according to the terms of the commercial license.

Please remember that export/import and/or use of strong cryptography software, providing cryptography hooks, or even just communicating technical details about cryptography software is illegal in some parts of the world. So when you import this software to your country, re-distribute it from there or even just email technical suggestions or even source patches to the authors or other people you are strongly advised to pay close attention to any laws or regulations which apply to you. Hex Five Security, Inc. and the authors of the software included in this repository are not liable for any violations you make here. So be careful, it is your responsibility.


MultiZone technology is protected by patents US 11,151,262 and PCT/US2019/038774

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