IT managers also use a 'firewall' to block or allow data access based on what is private and what is public. A firewall is software that controls where the data and users go, or otherwise 'keep an eye' on what they actually do. College web sites or Intranets sometimes have a feature that allows people to interact with their site. A badly written script can be a security risk - one computer hacker fooled the script into supplying the network's password list. A better firewall would have prevented this.
Computers are ever at risk of meeting viruses - programs that can damage data.
Another was offered a 'sexy' screensaver that was in fact a password 'sniffer' that mailed his details to the miscreant. Anti-virus software, if kept up to date with the latest scams may guard against this. Be aware too that virus scares are as common and very disruptive. Locks can be installed, but with too many locks people leave them open. Likewise, computer use can be heavily controlled, but this can lead them to leave their computers on while they are at lunch or just feel that the system can look after itself.