This is a prototype forged from a prototype.
It should ONLY be used for experiments. It is an adaptation of Ian's original work and under development. THINGS WILL BREAK.
There are no alternative implementations, meaning you are totally dependent on this tool if you use it. That is a dangerous situation to be in.
More information about Shamir39b can be found at the Draft Shamir39b Specification. There is no plan at the moment to formalize this flavour of the spec; it's only intended as a documentation aid and means to explore possible permutations of Ian's current proposal.
Ian's original specification can be found at the Draft Shamir39 Specification, and he welcomes feedback which can be provided by raising a new issue in his repository. Please don't open issues relating to the Shamir39b experiment as it is not supported.
Read more at the official BIP39 spec
Read more on wikipedia.
This page uses a custom implementation of SSSS based on amper5and/secrets.js.
The implementation used on this page can be found in Shamir39b Library (currently under development).
You can use this tool without having to be online.
In your browser, select file save-as, and save this page as a file.
Double-click that file to open it in a browser on any offline computer.
Alternatively, download the file from the repository - https://github.com/rkagerer/shamir39b
Get the source code from the repository - https://github.com/rkagerer/shamir39b
jsBIP39 - https://github.com/iancoleman/jsbip39
sjcl - https://github.com/bitwiseshiftleft/sjcl
jQuery - https://jquery.com/
Twitter Bootstrap - http://getbootstrap.com/