Mainframe security (or mainframe era security) was stronger simply because of access. Introducing media required access to a connected peripheral and console (o

Mainframe security (or mainframe era security) was stronger simply because of access. Introducing media required access to a connected peripheral and console (or TSO, at least) access, both of which were probably in a secure, raised-floor computer center. You couldn't rely on leaving a tape sitting on a bench and expect an operator to just load it, a la Stuxnet.