"The code of a rootkit gets the rootkit installation started and can be activated by clicking on a link to a malicious Web site in an email or opening an infected PDF file."

Dropper.

Explanation:

A rootkit can be defined as a collection of hidden malicious computer software applications that gives a hacker, attacker or threat actor unauthorized access to parts of a computer and installed software. Some examples of rootkits are trojan, virus, worm etc.

The dropper code of a rootkit gets the rootkit installation started and can be activated by clicking on a link to a malicious website in an email or opening an infected PDF file such as phishing.

Hence, the dropper code of a rootkit launches and installs the loader program and eventually deletes itself, so it becomes hidden and not be noticed by the owner of the computer.

A rootkit can affect the performance of a computer negatively causing it to run slowly.

answer; i believe the answer is tls,transport layer security;

answerlibraries;