The many faces of data vulnerability: Information can be tapped when resident in memory. It can also be intercepted en route, on paper, and elsewhere
Donn B. Parker · IEEE Spectrum · 1984
The author looks at the need for new computer security methods as well as the practical limits to the level of security that can be attained. He discusses a theory of information security which is based on the concepts of safeguard principles and of objects and subjects.