• Unit 3: Signatures and Transactions

    Cryptographic signatures are fundamental to preventing fraud in Bitcoin transactions. Without them, people on the network could spend Bitcoins that are not theirs.

    In this unit, you'll learn what cryptographic signatures are, what is needed to create and validate a signature, how to sign and validate data using public and private keys, and how Bitcoin transactions use signatures to prevent fraud on the network.

    Completing this unit should take you approximately 1 hour.

    • 3.1: What is a Digital Signature?

    • 3.2: Exercise: Sign and Validate Data

    • 3.3: Introduction to Bitcoin Transactions

    • 3.4: How Bitcoin Transactions Use Signatures

    • Unit 3 Assessment

      • Receive a grade