This one from Dan Boneh at Stanford is a good intro to cryptography (you can see that it's old as "crypto" (in the URL) was the abbreviation for cryptography st

This one from Dan Boneh at Stanford is a good intro to cryptography (you can see that it's old as "crypto" (in the URL) was the abbreviation for cryptography still back then...) https://www.coursera.org/learn/crypto https://www.coursera.org/learn/crypto https://crypto.stanford.edu/~dabo/courses/OnlineCrypto/ https://crypto.stanford.edu/~dabo/courses/OnlineCrypto/ (Part two has been going live anytime now for ages... but it's still not there: https://www.coursera.org/learn/crypto2 https://www.coursera.org/learn/crypto2)