However, there is a shortage of skilled system administrators, and system operators do not always follow best practices. To be effective, firewalls should be combined with other security techniques such as encryption and intrusion detection. Keys for the lock Passwords Passwords can be lost, stolen or shared, potentially opening your network and systems to unauthorised users. If passwords used to gain unauthorised access are valid, it is unlikely you will detect the intrusion or be able to trace the violation. Though most companies run anti-virus programs as part of the logon process, employees may download infected files from the Internet and share them with colleagues.
Protection depends on the cooperation of employees.
New viruses are continuously being introduced, so anti-virus software must be updated regularly. Digital certifications provide third-party assurance that signatures have not been forged. Digital signatures are rapidly becoming legally binding around the world. However, without the processes to deliver and maintain them securely, they can only take you so far. By scrambling data, unauthorised prying eyes cannot read the contents.