Beginner cryptography suggestions for a high schooler that loves math?

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Check this out. Haven’t tried it to see how advanced it is, but it’s free so worth a look

https://learn.saylor.org/course/view.php?id=500

Not trying to specifically recommend bitcoin but the road will lead there. Thnx.

There is a cryptography unit in that link I gave you

I understand. Just trying to avoid bitcoin labeled things right now to avoid parental scrutiny. They already know I’m a bitcoiner but I’m just recommending cryptography in general right now. If the HSer likes it, bitcoin will become a topic to pursue.

cleartext: cat

key: dog

xor those bits

revert

research the history, and cost, of broken random number generators

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

Dan Bonet, Stanford University, Cryptography I

free online class

how many bits of entropy does your password need to have, to cost a highly motivated and well-funded attacker, on average, US$1,000,000 to crack your, yours specifically, password? and how do pbkdf iterations help increase that effective entropy? (think: famous OG bitcoiners, with well-known email addresses, keeping their bip39 seed phrases in their lastpass vault last summer)

how many oceans must one boil to crack a 12-word bip39 seed phrase? a 24-word bip39 seed phrase? show your work.