1 Some softwares will copy your edited documents to a temporary directory, and you can edit them (for example, if you install qq program through a USB flash drive, the QQ program will be copied to the temporary directory by the system, and even if you unplug the USB flash drive, you can still find the QQ installation package).

False, the computer screen does not emit infinite geomagnetic waves, except that the crt screen has a lot of radiation, and the signal of the wireless network card can be shielded.

There are two kinds of firewalls: hardware firewall and software firewall. Large enterprises generally use hardware firewalls, while individuals use software firewalls.

Digital signature is anti-counterfeiting in plain English, and the digital certificate in the network silver shield is used to verify identity. In plain English, it is also anti-counterfeiting, which is what you call confidentiality.

Finally, what are you degaussing?