The purpose of security is to protect IT values / data. There are many different strategies to increase security, e.g.:
To demand username/password from users.
Taking backup - i.e., make a copy of data. If data is deleted later, the old copy can be read.
Encryption. Here data is "translated" to languages, that are very hard to understand for outsiders.
Proxy, router and firewall work closely together to regulate the contact between the local network and the internet.
A threat to security is virus - small programs, copying themselves between machines, typically to destroy the machine. You can use anti-virus-programs and elementary knowledge of viruses against this - like, don't run random programs in emails.
Concept last updated: 15/09 2003.
- Informationsteknologi B til HH; 1.udgave; Peter Zangenberg, JPJ, FDM (obl.) - 9. Virksomhedens sikkerhedsstrategi og -politik