With all the current discussions about crypto, RSA, backdoors, random number generators, etc, it's worth reading things like this to come up to speed with the concepts, even if you don't get all the details.
Normally obvious dups are detected by the system, but many are not. You can search before submitting, but most people don't bother. People will pick it up and cross-reference earlier discussions if appropriate.
https://news.ycombinator.com/item?id=6607661
With all the current discussions about crypto, RSA, backdoors, random number generators, etc, it's worth reading things like this to come up to speed with the concepts, even if you don't get all the details.