What are the main aspects of blockchain cryptography technology?

Blockchain cryptography technology mainly involves six aspects: 1. Cryptographical hash function; 2. Digital signature; 3. Public key infrastructure (PKI); 4. Asymmetric encryption; 5. Symmetric encryption; 6. Zero-knowledge proof . Together, these technologies provide a strong security foundation for the blockchain, ensuring data integrity, transaction security and user identity authenticity.

What are the main aspects of cryptographic technology in blockchain?

Blockchain is a distributed ledger technology, and its security is based on the widespread application of cryptographic technology. It mainly involves the following aspects:

1. Cryptographic hash function

• One-way function, input data of any length and output a fixed-length hash value (summary).
• Collision irresistibility, that is, it is difficult to find two different inputs that produce the same hash value.
• For verifying data integrity and block linking.

2. Digital signature

• allows users to securely verify data.
• Private key and public key are used in pairs. The private key is used to generate the signature and the public key is used to verify the signature.
• Ensure the authenticity and non-repudiation of blockchain transactions.

3. Public Key Infrastructure (PKI)

• manages and distributes digital certificates.
• Digital certificates associate a public key with a person or entity.
• By verifying the digital certificate, you can ensure the authenticity of the other party's identity.

4. Asymmetric encryption

• uses different keys for encryption and decryption.
• The public key is used for encryption and the private key is used for decryption.
• Widely used for key exchange and secure communication.

5. Symmetric encryption

• uses the same key for encryption and decryption.
• Faster and more efficient than asymmetric encryption.
• Usually used for data transmission and storage.

6. Zero-knowledge proof

• allows an individual to prove possession of certain information without revealing the actual information.
• Used to protect privacy and enhance the scalability of blockchain.

These cryptographic technologies work together to provide a strong security foundation for the blockchain, ensuring the integrity of data, the security of transactions, and the authenticity of user identities.

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