Columbia subject headings:
Computer software--Law and legislation--United States.
Computers--Access control--United States.
Data encryption (Computer science)--Law and legislation--United States.
Export controls--United States.
Harvard subject headings:
Computer software--Law and legislation--United States
Computers--Access control--United States.
Data encryption (Computer science)--Law and legislation--United States
Export controls--United States.
Princeton subject headings: