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

Under a number of policies that major browsers around the world have launched to support HTTPS, more and more websites have to put down the simple and fast HTTP plaintext protocol for network security and switch to the website security certificate download protocol. Many people do not know much about how to download https security certificates. With more and more errors about ssl, here are the reasons for the expiration of https security certificates and solutions, hoping to help users of major websites solve the expiration of ssl certificates.

First, the reasons for the expiration of the website https security certificate

1. The current computer system time is not right. All http security certificates have issuance dates and deadlines. If the computer system time is outside the valid time range of the certificate, it may cause the browser to prompt the website that the https security certificate is wrong or not yet valid.

2. The https security certificate of the website has indeed expired. According to the latest international standard for issuing https security certificate, https security certificate can not be issued for more than 39 months.

3, site application other deployed https security certificate outside the chain, if the certificate outside the chain expired will also prompt the corresponding error. The terminal devices that can detect certificate errors in the outer chain are: mobile browser and PC IE6.

II. What if the ssl certificate expires?

When a user opens a website and prompts that the certificate has expired or is invalid, he should first check the validity period of the certificate. So how should it be done? A better way, you can use Firefox browser to query. Let's take west.cn as an example. After entering the corresponding address in the address bar, you can see a small green lock on the left, indicating that the site is protected by https. Click the small green lock, click the right arrow in the pop-up menu, select more information, and open the page information tab. In the security tab interface, you can see the authority of the certificate and the specific expiration time. Click the View Certificate button, open the certificate viewer, and get the serial number, validity time, fingerprint and other details of the SSL certificate. If you check and find that the security certificate has expired, just renew or repurchase the certificate immediately.

III. Download method of https certificate

Different browsers display HTTPS sites differently, but the ways to download and view https security certificates are basically the same. For sites with https certificates, browsers will display a "security lock" on the address bar. Click the "security lock" icon, the browser will tell you that the current website is secure, and then click "Certificate" to view the detailed description of the security certificate of the current website, which can be optimistic about a lot of useful information in the certificate details.

Through the above introduction, you can know the way to download the https security certificate, and the editor also introduces the reasons and solutions for the expiration of the https security certificate. I hope you can learn about the download method of the website security certificate and the solution of the certificate expiration.

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