Governments of many countries were busy catching the hackers behind a massive “ransomware” that locked over 200,000 computers in over 150 countries, whereas Microsoft on May 14 accused the U.S government of keeping many software vulnerabilities secret. Cyber security experts said the spread of the ransomware called “Wanna Cry” had slowed, however the replacement of the ransomware are expected. They also said that the cause of the damage  was still unclear.

I think this problem is very serious. By being infected with the worm, there is a possibility that the hacker violate privacy of people using computers. Those who use computer also have to be careful of how to do so.