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This video explains how to encrypt and decrypt RSA using small numbers. Please excuse the sound quality, I'm not yet familiar with the new technology. 0:00 Introduction 0:30 Explanation of key pair (public and private key) 1:25 Encryption formula 2:00 Decryption formula 2:24 Demonstration of encryption formula 2:48 Demonstration of decryption formula 3:07 Example of text encryption 5:11 Example of text decryption 6:25 Exercise