3 ms·
sharing information while controlling who gets to see it, who does not, making sure it is timely, making sure it is gone when it is no longer timely, and making
by evilotto 7y ago
sharing information while controlling who gets to see it, who does not, making sure it is timely, making sure it is gone when it is no longer timely, and making sure all of these things continue to be the case is still a problem more than six _centuries_ after the invention of the printing press.