Secure data processing system architecture with format control
Computer system for preventing copying of program from a storage medium by modifying the program using a unique key
Cryptographic labeling of electronically stored data Patent #: 4864616
ApplicationNo. 529107 filed on 05/25/1990
US Classes:713/165, File protection340/5.74Access to electrical information
ExaminersPrimary: Tarcza, Thomas H.
Assistant: Gregory, Bernarr E.
Attorney, Agent or Firm
International ClassH04L 009/32
AbstractThere is disclosed a system and method of extending the labels on an encryption technique so that different users can utilize the same files under different rights established by both the user and the system administrator. This system and method take advantage of an extension of the file label which contains configuration capabilities and user rights and privileges to that file. The extended labeling is expandable so that several users can each be identified having specific rights and specific encryption capability with respect to the file.