Shulou(Shulou.com)06/01 Report--

When it comes to encrypted communications, many people will think of using SSL certificates to encrypt HTTPS communications, but there are also many people who do not understand what HTTPS encrypted communications are and why they need to use HTTPS encrypted communications. This article will give you a detailed answer.

Encrypted communication mechanism

First of all, what kind of mechanism is encrypted communication? Encrypted communications encrypt and decrypt data according to certain rules so that data can be exchanged over the Internet without being stolen by third parties. The transformation from the original text is called encryption, while the transformation from the ciphertext to the original text is called decryption. At present, there are two encryption methods for encrypting data.

Public key encryption (PKI)

This is a method of encryption and decryption using different keys. Prepare a pair of keys (public key and private key) in advance for encryption and decryption, respectively. When encrypted with a public key, it can only be decrypted with a private key.

Advantages: public key encryption must be decrypted with a paired private key. As long as the private key is not disclosed, the security of the data can be guaranteed, so it will be easier and more secure to manage the key.

Cons: more time is needed for encryption and decryption.

Universal key encryption method

Use the same key for encryption and decryption.

Advantages: fast processing speed of encryption and decryption.

Disadvantages: because the encryption and decryption use the same key, the key is at risk of disclosure, resulting in the risk of data eavesdropping and tampering.

Encrypt communications using HTTPS with SSL certificates

The usual Internet communication is the plaintext communication protocol of HTTP. Under this communication protocol, information is transmitted in clear text. In this way, there will be the risk of being stolen and tampered with by a third party. Therefore, we use HTTPS protocol to encrypt communication.

HTTPS protocol uses encryption to transmit data, and uses the public key encryption method which is more suitable for the Internet. As long as the Internet website installs and deploys the SSL certificate on the server, it can realize the HTTPS protocol communication.

HTTPS protocol first uses public key encryption to encrypt the key, and then transmits the key to the server. After the server uses the private key to decrypt the key, the client and server can establish a secure access channel. In the following communication, the faster encryption of general key will be used for data transmission.

In this way, HTTPS protocol not only has the security of public key encryption, but also has the two advantages of high speed of general encryption. HTTPS protocol is bound to replace HTTP to become the mainstream communication protocol in the future.

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