how does blockchain support data privacy
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Blockchain transactions allow users to control their data through private and public keys, allowing them to own it. Third-party intermediaries are not allowed to misuse and obtain data. If personal data are stored on the blockchain, owners of such data can control when and how a third party can access it.
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Blockchain systems use asymmetric cryptography to secure transactions between users. In these systems, each user has a public and private key. ... It is mathematically impossible for a user to guess another user's private key from their public key. This provides an increase in security and protects users from hackers.
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