While hackers tried to get rich by stealing millions of credit cards from Target, other cybercriminals have quietly tried another method to make a quick buck: Asking companies to pay them to go away.
In recent weeks, two companies have publicly described their experiences with what has become a popular hacker tactic: cyber extortion. Cybercriminals have threatened to disclose sensitive data or cripple websites unless their victims pay hundreds or even thousands of dollars in ransom.