Cryptography

check out these links:

https://www.macworld.com/article/3234650/keranger-the-first-in-the-wild-ransomware-for-macs-but-certainly-not-the-last.html 

and 

https://www.welivesecurity.com/2016/03/07/new-mac-ransomware-appears-keranger-spread-via-transmission-app/

and

https://www.forbes.com/sites/bradmoon/2016/03/06/ransomware-hits-mac-users-heres-what-you-need-to-know-about-keranger-and-transmission/#7feefdb97c12

my point: 

1) what methodology will you use to protect the data?

2) What are the biggest challenges faced by companies using encryption?

3) what are the common attacks and how will you protect against them?