What is the definition of an SSL certificate? What is the use of an SSL certificate?

An SSL certificate is a type of digital certificate that is similar to an electronic copy of a driver's license, passport, and business license. Because it is configured on the server, it is also known as an SSL server certificate.

The main functions of an SSL certificate are:

1. Through 128-256-bit encryption at the transport layer, the network transmission data security is ensured. Access using the HTTPS encryption protocol**, for the client (browser).

An encrypted channel is built between the server to achieve high-strength two-way encrypted transmission, ensure the security of users' confidential information, and prevent the theft or tampering of important data such as user information and financial information. In other words, the security of data is more secure after the SSL certificate is installed.

2. Verify the real identity of the server. If you have installed an SSL certificate issued by a third-party authority, you can display the security lock logo in the browser address bar, click to query the real identity of the **, and some install the EVSSL certificate**, the entire address bar will turn green, and you can see at a glance that the SSL certificate is installed, which can effectively avoid the economic losses caused by phishing and fraud.

An SSL certificate is a type of digital certificate (digital certificates include: SSL certificate, client certificate, signing certificate, etc.), because the configuration is also called the server SSL certificate on the server. SSL certificates are those that comply with the SSL protocol and are established by a trusted digital certificate authority (CA) (e.g

WoSign CA) is a digital certificate issued after verifying the identity of the server.

The main functions of SSL certificates are to implement encrypted data transmission, anti-hijacking, encrypted transmission protocols, etc., as follows:

1. Encrypted transmission

When the user accesses ** through the HTTP protocol, there is a clear text transmission between the browser and the server, which means that the confidential information such as the password and transaction records filled in by the user are in clear text, which may be leaked, stolen, tampered with and used by hackers at any time.

After installing the SSL certificate, use the https encryption protocol to access it, which can activate the relationship between the client browser and the server"SSL encrypted channel"(SSL protocol) to achieve high-strength two-way encrypted transmission to prevent the transmission data from being leaked or tampered with.

2. Authenticate the real identity of the server

Phishing scams are rampant, and how users can identify if it's phishing. After deploying the globally trusted SSL certificate, the browser has a built-in security mechanism to check the certificate status in real time, and display the authentication information to the user through the browser, so that the user can easily identify the real identity and prevent phishing.

In addition, the information displayed on the certificate contains complete company information. This type of certificate uses 256-bit SSL encryption to ensure the security of transactions, so that your users and visitors can know that their information transmission with you** is using advanced SSL encryption technology, and there is a guarantee of compensation.

4. Improve the access speed

Through the HTTP vs HTTPS comparison test, it is shown that the new generation of HTTP2 protocol using SSL certificates has a much faster access speed than using the HTTP protocol.

5. Improve the company's brand image and credibility

If the SSL certificate is deployed, the HTTPS green security lock will be displayed in the browser address bar. It can tell users that they are visiting a safe and trustworthy site, and can operate and transact with confidence, effectively enhancing the company's brand image and credibility.

Encryption of data in transit

Installing an SSL certificate can establish an encrypted channel between the client browser and the web server, effectively preventing important sensitive information such as passwords, mobile phone numbers, and ID cards from being snooped on and stolen.

Authentication

SSL certificates are issued by CA institutions trusted by browsers, and applying for SSL certificates requires strict verification of the identity of the organization, so as to ensure the authenticity of the organization and prevent the appearance of fraud.

Enhance your brand image

The installation of the SSL certificate will display the lock logo in the address bar, and the advanced version of the EV certificate will also display the green address bar and the name of the organization, which will ensure the authority and authenticity, and greatly enhance the brand image of the enterprise.

Google, and other browsers have made it clear that they give priority to displaying the ** that uses the https protocol, and give the **higher search weight of the SSL certificate installed**, so the installation of the SSL certificate is of great help to improve the SEO effect.

The above is the relevant introduction to the role of SSL certificate, I hope it can help you

The specific functions of SSL certificates are mainly as follows:

Ensure the security of information transmission。When users log in to ** for online transactions, they need to transmit some transaction information to the server, most of which are directly related to the user's private information and economic interests, and the SSL certificate can prevent information leakage.

Improve the authenticity of **. Nowadays, there are some irregularities on the Internet, which makes many users more vigilant against network fraud, and whether they have an SSL certificate has also been used as an important indicator for the majority of users to judge the authenticity of the **.

Increase the number of visits and the success rate of transactions。It can be said that this is a chain reaction triggered after the user confirms the authenticity of **. Once the user has established a sense of trust, they are likely to continue browsing or trading.

It is conducive to the healthy development of enterprises.

1. Encrypted data transmissionHTTPS encrypted APP and web communication are used to prevent data from being stolen and tampered with during transmission, and to ensure the integrity of data; Prevent the operator's traffic hijacking and advertising on the web page; At the same time, it effectively resists man-in-the-middle attacks and greatly improves security.

2. High compatibilityCompatibility is related to whether the browser will correctly give web page security tips when the user visits, and the browser compatibility of the joySSL certificate supports all mainstream browsers and mobile devices.

In 2014, Google adjusted the search engine algorithm, compared with the same HTTP**, the use of HTTPS encryption** in the search results will be higher, at the same time, domestic search engine manufacturers are also strengthening the importance of HTTPS, the use of HTTPS can assist the SEO optimization of the site.

SSL certificate can encrypt the transmitted data and effectively protect user information, and has been widely used by various governments and enterprises

But in the process of installing and using SSL, people often encounter a variety of problems. Here, the three parties of Zhongke will take stock of some common problems and corresponding solutions for SSL certificates.

The certificate is not issued by a trusted authority:

Cause: This is due to the SSL certificate being used by the server, which is not issued by a CA authority trusted by the browser or is using a self-signed certificate. Method:

You can view the list of certificate authorities trusted by the browser in the "Tools Internet Options Content Certificates" of the browser, and try to choose a formal and professional service provider when purchasing a certificate.

Zhongke Tripartite Certificate Service cooperates with world-renowned CA institutions such as Symantec and CFCA to support all mainstream browsers.

**The certificate has expired or has not yet taken effect.

Reason: There are generally two situations when the browser appears this prompt, one is that the date of the computer system is set incorrectly, and the other is that the certificate has expired and needs to be renewed.

Method: First, you need to check the start and end dates of the certificate to confirm whether the certificate is still valid, and if the certificate has expired, you need to contact the certificate vendor to renew it as soon as possible. If the certificate is still valid, check whether the system date on your computer is incorrect, and correct it in time.

The page contains unsafe content.

Reason: If you need to access it through HTTPS, then every page and every element in it must be in HTTPS mode, if there are elements in **, such as: **, js scripts, flash plug-ins are called through http mode, such an error will occur.

The most common is to call the flash plugin: codebase=''。Method: Try to change the http call to https call, and this kind of problem can be solved after refreshing.

The domain name that is accessed is not the same as the domain name that is included in the certificate.

Reason: The domain name of each SSL certificate is unique. If the SSL certificate contains a domain name that does not match the domain name you are currently visiting, the browser will send such a message.

If your primary domain has multiple subdomains, you need to apply for a multi-domain or wildcard domain. Zhongke Sanfang provides multi-domain names and wildcard domain names of various brands, which can meet the needs of users for multi-domain names.

The installed SSL certificate is not the correct SSL certificate.

If this is the case, you can uninstall the original certificate and check whether there is any problem with the configuration and installation of the new SSL certificate.

An SSL connection error is displayed when browsing the web.

Reason: Since some web pages require the browser to support SSL to access, you can enable SSL to solve the problem.

Method: Press the "Win+R" key combination to open the run, enter "Internet Options" in the run box, switch to the [Advanced] tab, and check "Use SSL to use the click app" in the settings box and click OK to restart the browser.

What is an SSL certificate? An SSL certificate is a digital certificate, similar to an electronic copy of a driver's license, passport, etc. Because it is configured on the server, it is also called an SSL server certificate.

This certificate is SSL-compliant and issued to a trusted digital certificate authority by the CA after confirming the identity of the authentication server, with server authentication and data transmission encryption.

This digital certificate is actually very similar to our e-passport, and it also has a deadline, after which it needs to be re-certified. The most important function of a digital certificate is to protect the security of the company from being attacked by hackers or malicious damage by competitors. SSL digital certificate is a global security certificate, which can well ensure the security of the world, and if it is some online shopping, an SSL certificate is even more needed.

There are many types of SSL digital certificates, but all of them are issued by the same organization, that is, the CA organization. Customers can apply for digital certificates according to their own needs. The cost of different certificates is also different.

It can meet the needs of different users.

Frankly speaking, SSL digital certificate is the foundation and standard configuration of a **, and only with the certification of SSL digital certificate can it run better.

The SSL certificate is installed on the first to upgrade HTTP to HTTPS encryption protocol, protect the security of the data from theft, maintain the integrity of the data, and ensure that the data is not changed during transmission.

1. Data encrypted transmission: After HTTPS encryption is realized, an encrypted channel will be established from the user end to the first server side to ensure that the data is not stolen or tampered with by a third party, and to protect the security of user accounts, passwords and transaction data.

3. Prevent traffic hijacking: effectively solve the problem of traffic hijacking of search engines and major sites, and prevent the occurrence of problems such as the tampering of the search results page and the forced insertion of pop-up windows or embedded advertisements in the returned content.

Let me briefly ask you about it.

When we visit, the browser and the server communicate based on the HTTP protocol. However, the data sent and received under the HTTP protocol are transmitted in plaintext, which means that all kinds of data in your access, especially sensitive information such as name, mobile phone number, and password, are exposed and public, which can easily cause information leakage and cause serious losses to the security of users' information and property.

In the context of individuals and enterprises paying more and more attention to data, SSL certificates have become an important configuration for many of them to improve data security. An SSL certificate is similar to an ID card, and it is also an identity certificate, except that the object it verifies is the identity of **. The SSL certificate is issued by a CA organization trusted by the browser, and will conduct strict identity verification on each applicant, so the authenticity of the SSL certificate is also effectively guaranteed.

If you install an SSL certificate, user trust will be significantly improved.

In terms of data security, installing an SSL certificate can establish a private channel between the client browser and the web server, which can effectively protect user data from theft and tampering. Therefore, SSL certificates can achieve the dual effect of authentication and data transmission encryption, so now more and more enterprises and even individuals are starting to install SSL certificates.

An SSL certificate is a digital certificate that verifies** identity and enables encrypted connections.