An article explaining the role of encryption technology in detail! What does encryption do?

It provides an efficient platform for secure and decentralized information exchange. In fact, digital encryption technology is the core element of blockchain technology. It is precisely because of this encryption technology that it has attracted people's attention to blockchain cryptography, because ensuring the security of user information and transaction data is necessary to promote the popularization of blockchain. preparation conditions.

What is the role of encryption technology?

The application scenarios of asymmetric encryption technology in blockchain mainly include information encryption, digital signature and login authentication.

Information encryption scenarios usually involve the information sender (A) using the public key of the receiver (B) to encrypt the information and then sending it to B, who then uses his own private key to decrypt it. The encryption technology used in Bitcoin transactions is also based on this scenario. In this case, the public key is used to encrypt the data, while the private key is used to decrypt the data, ensuring the security and confidentiality of the information during transmission. This encryption method is widely used in many fields, including network communications, financial transactions, and data transmission. Through public key encryption and private key decryption, information

In the digital signature scenario, sender A uses his own private key to encrypt the information, and then sends the encrypted information to receiver B. Receiver B uses sender A's public key to decrypt the message, which ensures the authenticity and integrity of the message.

In the login authentication scenario, the client uses the private key to encrypt the login information, and then sends the encrypted information to the server. After receiving the information, the server uses the client's public key to decrypt it and verify the validity of the login information.

Note the differences in encryption in the above three scenarios:

Information encryption uses public key encryption and private key decryption to ensure the security of data transmission. Digital signatures use private keys for encryption and public keys for decryption to ensure the verifiability of the signature. Login authentication usually uses private key encryption and public key decryption to verify identity.

Classification introduction of encryption technology

In the application and development of blockchain technology, digital encryption technology is the key. Once the encryption method is cracked, the data security of the blockchain will be challenged, and the immutability of the blockchain will no longer exist. Encryption algorithms are divided into symmetric encryption algorithms and asymmetric encryption algorithms. Asymmetric encryption algorithms are mainly used in blockchains. Public key cryptography systems in asymmetric encryption algorithms are generally divided into three categories based on the problems they are based on: Large integer decomposition problems , discrete logarithm problem class, elliptic curve class.

Encryption algorithms are generally divided into symmetric encryption and asymmetric encryption. Asymmetric encryption refers to the encryption technology integrated into the blockchain to meet security requirements and ownership verification requirements. Asymmetric encryption usually uses two asymmetric ciphers, called public and private keys, in the encryption and decryption processes. Asymmetric key pairs have two characteristics: First, after encrypting information with one of the keys (public key or private key), only the other corresponding key can decrypt it. Second, the public key can be disclosed to others, while the private key is kept confidential. Others cannot use the public key to deduce the corresponding private key.

Asymmetric encryption is generally divided into three main categories: large integer decomposition problem type, discrete logarithm problem type, and elliptic curve type. Large integer decomposition problems refer to using the product of two larger prime numbers as the encrypted number. Due to the irregularity of the appearance of prime numbers, the solution can only be found through continuous trial calculations. The discrete logarithm problem class refers to an asymmetric distributed encryption algorithm based on the intractability of discrete logarithms and using a strong one-way hash function. The elliptic curve class refers to the use of planar elliptic curves to calculate groups of asymmetric special values. Bitcoin uses this type of encryption algorithm.

The above is the detailed content of An article explaining the role of encryption technology in detail! What does encryption do?. For more information, please follow other related articles on the PHP Chinese website!