README

NAME
    Crypt::SSSS - implementation of Shamir's Secret Sharing System.

SYNOPSIS
        use Crypt::SSSS;

        # use (3, 3) scheme
        my $shares = ssss_distribute(
            message => "\x06\x1c\x08",
            k       => 3,
        );

        # Save shares
        for my $share (1 .. 3) {
            open my $fh, '>', "share${share}.dat";
            print $fh $shares->{$share}->binary;
            close $fh;
        }

        # Reconstruct message
        my $ishares = {};
        for my $share (1 .. 3) {
            open my $fh, '<', "share${share}.dat";
            $ishares->{$share} = do {
                local $/;    # slurp!
                <$fh>;
            };
            close $fh;
        }

        print "Original message: ", sprintf '"\x%02x\x%02x\x%02x"',
          unpack('C*', ssss_reconstruct(p => 257, shares => $ishares));

DESCRIPTION
    Implementation of Shamir's Secret Sharing Scheme.

ATTRIBUTES
    Crypt::SSSS implements the following attributes.

  "ssss_distribute"
        my $shares = ssss_distribute(
            message => $message,
            k       => $k,
            p       => $p,         # 257 by default
            n       => $n,         # By default equals to k
        );

    Distribute $message to $n shares, so that any $k shares would be enough
    to reconstruct the secret. $p is a prime number.

    Returns hashref of Crypt::SSSS::Message.

  "ssss_reconstruct"
        my $secret = ssss_reconstruct(
            shares => $shares,
            p      => $p,        # 257 by default
        );

    Reconstruct message from given $shares. $p is a prime number used to
    distribute message.

AUTHOR
    Sergey Zasenko, "undef@cpan.org".

CREDITS
    Mohammad S Anwar (MANWAR)

REPOSITORY
    <https://github.com/und3f/crypt-ssss>

COPYRIGHT AND LICENSE
    Copyright (C) 2011, 2016, Sergey Zasenko.

    This program is free software, you can redistribute it and/or modify it
    under the same terms as Perl 5.10.