A trusted CA is the only entity that can issue trusted digital certificates. This is extremely important because while PKI manages more of the encryption side of these certificates, authentication is vital to understanding which entities own what keys. Without a trusted CA, anyone can issue their own keys, authentication goes out the window and chaos ensues. Reference: https://cheapsslsecurity.com/blog/understanding-the-role-of-certificate-authorities-in-pki/ A trusted CA is the only entity that can issue trusted digital certificates. This is extremely important because while PKI manages more of the encryption side of these certificates, authentication is vital to understanding which entities own what keys. Without a trusted CA, anyone can issue their own keys, authentication goes out the window and chaos ensues. Reference: https://cheapsslsecurity.com/blog/understanding-the-role-of-certificate-authorities-in-pki/

A botnet is a collection of internet-connected devices infected by malware that allow hackers to control them.
Cyber criminals use botnets to instigate botnet attacks, which include malicious activities such as credentials leaks, unauthorized access, data theft and DDoS attacks.

TAXII (Trusted Automated Exchange of Indicator Information) is a standard that provides a transport