This is because in the asymmetric encryption algorithm, the private key and the public key are a pair of keys, the private key is used to encrypt data and the public key is used to decrypt data. Therefore, the data encrypted with the private key can only be decrypted with the corresponding public key, which ensures the confidentiality and security of the data.

Asymmetric encryption algorithm appears to solve the security problem of key distribution in symmetric encryption algorithm. Asymmetric encryption algorithm can transmit keys and data safely in insecure communication environment by separating private keys from public keys. Among them, the private key is used for encryption and decryption operations, while the public key can be publicly distributed to verify the identity of the recipient of the signature and encrypted data.

Therefore, in asymmetric encryption algorithm, the content encrypted with private key can be decrypted with public key, which is one of the basic principles of algorithm design. At the same time, due to the confidentiality of the private key, only the holder of the private key can encrypt and decrypt the data, further ensuring the security of the data.

Matters needing attention in private key encryption

1. Protect the security of private key: the private key is the key to encrypt and decrypt data, and must be properly kept to prevent leakage. Once the private key is leaked, the encrypted data may be decrypted, causing serious data security problems.

2. Choose a powerful encryption algorithm: When choosing an encryption algorithm, you should choose an algorithm that has been widely verified and accepted to ensure the security of encryption. At the same time, we should also pay attention to the strength and complexity of the algorithm to avoid being cracked.

3. Change the private key regularly: In order to increase security, you can change the private key regularly to reduce the risk of being cracked.

4. Do a good job of backup and recovery: backup the private key to prevent loss or damage. At the same time, it is also necessary to ensure that the backed-up private key is equally safe to prevent it from being illegally obtained.