____________________ is software that displays advertisements and collects data. Sometimes downloaded intentionally with free software programs.

Google IT Support Professional Certificate Course 5
IT Security: Defense against the digital dark arts

This course will help you understand:
- how various encryption algorithms and techniques work as well as their benefits and limitations.
- various authentication systems and types.
- the difference between authentication and authorization.
- how to evaluate potential risks and recommend ways to reduce risk.
- best practices for securing a network.
- how to help others to grasp security concepts and protect themselves.