Hundreds of thousands of Computers around the world were hijacked last week. In Great Britain the blackmailers attacked 48 hospitals. Doctors had to move or cancel operations. In Spain, a large telephone company was affected. In Germany, computers of the country’s train system were attacked. Security agencies around the world are now investigating the attacks.
The blackmailers used a virus during the attack. After becoming infected with the virus, the computers can no longer recognize data. Next a demand appears on the screen. It tells the owners of the computers to pay blackmail money to remove the virus. Only then do the computers work again.
This kind of attack is called a ransomware attack. They have been increasing rapidly over the past several years.
This scale is based on the grade level of the text. For example, a “10.0” means the reading level of a tenth grade elementary textbook. A ’12’ is equal to the 12th grade or last year in high school, a ’13’ equals the first year in university. The grade levels correspond to the U.S. school system.