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Asymmetric Encryption – Blockchain 101

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Asymmetric encryption is a cryptographic system that uses both public keys and private keys.

Public-key encryption is when a message is encrypted with a recipient’s public key. The message can only be decrypted with the corresponding private key. The public-key encryption system attempts to provide confidentiality while providing an avenue to communicate.

A digital signature is a message or transaction signed with the sender’s private key, and it can be verified by anyone who has access to the sender’s public key. This process verifies that the sender has access to the needed corresponding private key, and is therefore likely to be associated with public key as well. This encryption ensures that the message is unchanged between the sender and the receiver.

Blockchain 101
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