Intermediate4 lessons

Cryptography Foundations

Math That Secures Bitcoin

The hash functions, signatures, and key types that make Bitcoin work without trust.

20 min

One-way functions, why they matter, and how Bitcoin uses them everywhere.

How private keys prove ownership without revealing themselves.

The two signature schemes Bitcoin supports and why Schnorr is a big upgrade.

Legacy, SegWit, and Taproot addresses — what changes and why it matters.