"NSBD, Not-So-Bad Distribution, is a freely available, open WWW-based authenticating software distribution system. NSBD adds two basic things to simple web downloads: it authenticates maintainers of packages with digital signatures so users can trust where the packages come from, and it supplies a means of checking for updates to the packages and automatically downloading and installing the updates. This "";automated pull""; style of distribution has the same effect as the "";push""; style of distribution that is being given press lately, but gives more control to the user (a "";push""; style is also supported that is not used as frequently). NSBD uses "";Pretty Good(Tm) Privacy""; (PGP(Tm)) for authentication. NSBD's focus is on security, leaving as much control as practical in the users' hands. The single NSBD program handles the operations done by both maintainers of packages and users of packages."