What is it about anti-infiltration techniques that makes them so successful?

In your own words, what does the phrase "phishing" mean to you?

Respond to the following in a minimum of 175 words:  Discuss a cryptography attack scenario. Choose an attack and explain how it works. Be sure to choose one that hasn’t been mentioned by another classmate. What countermeasures would you apply? How do the countermeasures you would use compare to those your classmates recommended for the attacks they chose? What do those similarities or differences tell you about fighting these types of attacks?

What precisely is a Trojan horse, and how does it operate in practice? There should be three provided examples.