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readme: Add note on sss-cli variable-length shares

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Daan Sprenkels
2017-10-30 16:50:53 +01:00
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@@ -6,7 +6,9 @@
a number of different _shares_. With the possession of some or all of these
shares, the original secret can be restored. It is the schoolbook example of
a cryptographic _threshold scheme_. This library has a [command line
interface](https://github.com/dsprenkels/sss-cli). ([web demo])
interface][sss-cli]. ([web demo])
[sss-cli]: https://github.com/dsprenkels/sss-cli
## Table of contents
@@ -154,7 +156,8 @@ If you would like your library to be added here, please open a pull request. :)
It should be important to note that a limited secret length does not mean
that it is impossible to share longer secrets. The way this is done is
by secret sharing a random key and using this key to encrypt the real
secret. This is a lot faster and had the security is not reduced.
secret. This is a lot faster and had the security is not reduced. (This
is actually how [sss-cli] produces variable-length shares.)
1. Uses the GNU gmp library.
2. Uses lookup tables for GF(256) multiplication.