Weak Diffie Hellman and logjam attack

https://weakdh.org/ and https://www.youtube.com/watch?v=z5LrjLz_Q50 

Design patterns in C++

https://github.com/JakubVojvoda/design-patterns-cpp  liked this. noted.

Factory pattern:
https://www.oodesign.com/factory-pattern.html