Columbia subject headings:
Business enterprises--Computer networks--Security measures--Congresses.
Computer security--Congresses.
Data transmission systems--Security measures--Congresses.
Electronic commerce--Security measures--Congresses.
Public key infrastructure (Computer security)--Congresses.
Harvard subject headings:
Business enterprises--Computer networks--Security measures--Congresses.
Computer security--Congresses
Data transmission systems--Security measures--Congresses.
Electronic commerce--Security measures--Congresses.
Public key infrastructure (Computer security)--Congresses.
Princeton subject headings: