What is the role of cryptography in blockchain? (Symmetric vs Asymmetric Encryption)

Understand the critical role of cryptography in blockchain (including encryption, public key cryptography, hashing and digital signatures) and learn just enough about the topic to prepare for your interview! Learn more at: ▶ Website: https://hashcademy.com ▶ Udemy: https://www.udemy.com/user/hashcademy/ ▶ Instagram: https://www.instagram.com/hashcademy ▶ Facebook: https://www.facebook.com/hashcademy ▶ Medium: http://www.medium.com/hashreader