There are rules for driving a computer, too. Everyone knows that the rules of the road have to be taken seriously. So do the rules for using a computer. Two of those rules are basic: Everyone who uses a computer has a responsibility for the security of the information in that machine. No one who uses a computer has the right to violate anyone else’s security. To help people keep to those rules, we at IBM have developed a wide range of security systems. For instance, IBM computers can require identification in any number of ways, including passwords, keys and magnetic