Cryptography Basics: Hashes, Keys, and Signatures
The three tools every wallet and every blockchain rests on, explained without the maths: what they prove, and where they stop protecting you.
5 lessons
A plain-language course on the cryptography underneath crypto. You will learn what a hash function guarantees, how a private key, a public key and an address relate, how a digital signature proves who approved a transaction, why a public blockchain signs data but does not encrypt it, and why weak randomness has emptied real wallets.
Chapters & lessons
Fingerprints and Keys
Hash functions, and the key pair that turns a secret number into an address.
Signatures, Encryption, and Randomness
How a signature proves consent, why a public blockchain is readable by everyone, and why keys are only as strong as the randomness behind them.
Listen instead
The same chapters, by ear. One episode per chapter of this course.
Learn blockchain, on-chain markets, and meme launches one clear lesson at a time.
Sign up to start