Mathematics behind NSA controversy

How did the NSA hack our emails? 

To understand more, you can read this.

https://en.wikipedia.org/wiki/Dual_EC_DRBG

https://en.wikipedia.org/wiki/NIST_SP_800-90A 

Edward Snowden 

And this video below is to understand a little bit about cracking cyrptography


Safe Cracking With Feynmann