The purpose of a system is what it does. https://archive.nytimes.com/www.nytimes.com/interactive/2013/09/05/us/documents-reveal-nsa-campaign-against-encryption

The purpose of a system is what it does. https://archive.nytimes.com/www.nytimes.com/interactive/2013/09/05/us/documents-reveal-nsa-campaign-against-encryption.html https://archive.nytimes.com/www.nytimes.com/interactive/2013...