Columbia subject headings:
Computer security--Congresses.
Computers--Access control--Congresses.
Data encryption (Computer science)--Congresses.
Public key cryptography--Congresses.
Harvard subject headings:
Computer networks
Computer science.
Computer security--Congresses
Computer software.
Computers--Access control--Congresses.
Data encryption (Computer science)--Congresses
Data encryption (Computer science).
Public key cryptography--Congresses.
Princeton subject headings: