Identify the correct order of the following terms 1-4 to complete the passage: 'The action of sending emails to fraudulently obtain another person's bank details is called ___. The action of illegally installing malicious code which redirects a person to a fraudulent website to obtain their bank details is called ___. Unsolicited bulk emails are called ___. The action of sending text messages to fraudulently obtain another person's bank details is called ___.'

Fraudulently obtaining bank details by sending emails is phishing, which fills the first blank.

Illegally installing malicious code that redirects a victim to a fake website is pharming, filling the second blank.

Unsolicited bulk emails are spam, filling the third blank.

Fraudulently obtaining details through text messages is smishing, the SMS form of phishing, filling the fourth blank.

This gives the sequence phishing, pharming, spam, smishing across the four gaps.

All four are deception techniques, but phishing, pharming and smishing aim directly at stealing financial data.