Understanding Cryptography: A Textbook for Students and Practitioners

Thank you for your comment, these books will definitely be useful for me. In regards to how I learned the math prerequisites, all I used were these two books; - https://www.amazon.com/Modern-Cryptography-Elliptic-Curves-Mathematical/dp/1470435829 - https://www.amazon.com/Understanding-Cryptography-Textbook-Students-Practitioners/dp/3642446493