Authorities in Johannesburg are scrambling to gain control of the city's cyber networks from hackers who are demanding payment in bitcoins.
원문출처 : https://www.cnn.com/2019/10/29/africa/johannesburg-hackers-bitcoin-payment/index.html
원문출처 : https://www.cnn.com/2019/10/29/africa/johannesburg-hackers-bitcoin-payment/index.html