Trojan Horse/Virus/Vpn

1. Trojan Horse

Yet another form of malware, this one a misleading computer program that looks innocent, but in fact allows the hacker into your system via a back door, allowing them to control your computer.

 

2. Virus

Malware which changes, corrupts, or destroys information, and is then passed on to other systems, usually by otherwise benign means → ?(e.g. sending an email). In some cases, a virus can actually cause physical damage.
 

3. Vpn

An acronym standing for Virtual Private Network, a VPN is a method of connecting a series of computers and devices in a private encrypted network, with each user's IP address being replaced by the VPN's IP address. Users get Internet anonymity, making it difficult for hackers to attack.
 

 
 
 
 
* Reference
https://www.simplilearn.com/top-cybersecurity-terms-you-need-to-know-article