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00:00 Recap Lecture 1 01:06 Outline 01:11 Decentralizing Identity: Keys 03:11 Cryptography meaning & Caseer Cipher 07:03 Public key cryptography: key pair 09:36 Public Key for message integrity 13:09 Private key & digital signatures 15:29 Verify signature 25:04 Key pair usage in Blockchains 26:56 Keys & signatures demo 29:13 For advanced students (Verify signature tutorial) 29:59 Q&A 42:28 Transactions 45:17 Recap hash functions 46:25 What is a block 54:25 Chaining blocks animation 59:34 Transactions & blocks demo 01:02:11 Q&A 01:17:46 Consensus 01:20:36 Byzantine generals problem 01:22:39 Byzantine Fault Tolerance 01:23:47 Proof of Work 01:24:15 Mining 01:25:06 Fork 01:27:01 Hard fork 01:29:11 Soft fork 01:30:03 Unintentional fork 01:31:44 Wallets 01:35:11 Wallets types 01:40:29 Recovery seed phrase 01:42:03 How to keep your wallet secure 01:45:44 Create your first crypto wallet on Metamask 01:50:19 How to submit your coding assignment on Github classroom 01:52:34 Q&A 02:14:41 Feedback form
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