sudo apt install build-essential php7.0 php7.0-dev php7.0-mcrypt php-pear libsodium18 libsodium-dev
sudo pecl install libsodium scrypt
echo 'extension=libsodium.so' | sudo tee /etc/php/7.0/mods-available/libsodium.ini
echo 'extension=scrypt.so' | sudo tee /etc/php/7.0/mods-available/scrypt.ini
sudo phpenmod libsodium scrypt

composer install lyoshenka/php-triplesec

<?php

require __DIR__.'/vendor/autoload.php';

echo \lyoshenka\TripleSec::encrypt('this is the secret message', 's3cr3tk3y') . "\n";

php test/test.php