On: Rolling Your Own Crypto

[Kurtz79]

If you are interested in more than an article, this course is very good.

https://www.coursera.org/learn/crypto

Sorry to spoil it, but the conclusion will basically be the same as the article, as in "just don't".

[stavros → Kurtz79]

Yes, but arriving at the conclusion is very fun. Although, don't hold your breath for Cryptography II. I've been waiting for it for years.