F secure virus and spyware scanning updating
Other counter measures are patches, access control lists and malware filters.
Covert Channels are the means by which information can be communicated between two parties in a covert fashion using normal system operations.
Two types of caching are commonly used in personal computers: memory caching and disk caching.* Hot site.
It contains fully redundant hardware and software, with telecommunications, telephone and utility connectivity to continue all primary site operations.
Intrusion Prevention Systems (IPS) commonly employ countermeasures to prevent intruders form gaining further access to a computer network.
In other words, convert the cipher text to plaintext without knowing the key.