Thanks, I vaguely remember learning concepts of cryptography from khan academy when I was 15 or so, really great website. Since then some time passed and I vis

Thanks, I vaguely remember learning concepts of cryptography from khan academy when I was 15 or so, really great website. Since then some time passed and I visited the website on few occasions and I remember being astonished how much content they added. Thanks again for your advice, I appreciate it