WEBVTT

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In this lesson, we learned about cryptography in blockchain technology.

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We focused on how cryptography helps make blockchain networks secure and trustworthy.

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Let's go over the main points to review what we've learned.

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Cryptography in blockchain.

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Cryptography works like a digital lock and key.

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It helps protect data by encrypting and decrypting information during transactions.

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Digital signatures.

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Digital signatures use private keys to sign and public keys to verify transactions.

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This helps check that each transaction is real and not changed.

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Hash functions.

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These are special tools that turn data into a fixed-length code.

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They create a unique record for each block and help link blocks together securely.

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Public and private key encryption.

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Public keys are used as addresses.

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Private keys give secure access.

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Together, they protect the data on the blockchain.

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Real-world applications.

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We saw examples where blockchain is used for tracking products and improving supply chains.

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This shows how it can increase transparency and efficiency in many fields.

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To sum up, cryptography is a key part of blockchain.

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It helps keep data safe and systems reliable.

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These methods protect digital information and support new uses of blockchain in areas

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like logistics and healthcare.

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Remember these basics as we continue to learn more about how blockchain shapes the digital

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world.