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As an important means to ensure the security of website data transmission, SSL/TLS certificates are favored by many website operators. However, the high cost of certificates often becomes a burden for many small websites and personal blogs.

Steps to apply for Let's Encrypt free wildcard SSL certificate

1. Log in to this encrypted website, enter the domain name, and check the wildcard domain name and include the root domain.

2. Select the encryption method. Generally, the default one is sufficient, but you can also customize the CSR.
3. Select the channel, just choose Let's Encrypt here.
4. Domain name verification, verify according to your own situation.

5. Download the certificate and deploy it to the server.

The Let's Encrypt project came into being. It is free, automated and open, providing secure and reliable SSL/TLS certificate services for websites around the world.

1. Background and Origin of Let's Encrypt

Let's Encrypt is a free, automated and open certificate authority (CA) operated by the Internet Security Research Group (ISRG). The project was jointly initiated by Mozilla, Cisco, Akamai, EFF, ID Trustrust and other organizations to promote the security of the global Internet. By providing free SSL/TLS certificates, Let's Encrypt helps website operators easily implement HTTPS encrypted transmission and protect user data from attacks.

2. Features of Let's Encrypt

1. Free: The SSL/TLS certificates provided by Let's Encrypt are completely free and do not require any payment. This allows small websites and personal blogs to easily obtain SSL/TLS certificates and improve the security of their websites.
2. Automation: Let's Encrypt supports automated certificate application, verification, and renewal processes. Website operators can quickly complete certificate application and deployment through simple command line tools or ACME protocol clients. In addition, Let's Encrypt also provides an automatic renewal function to ensure that certificates are updated in time before expiration.
3. Open: Let's Encrypt adopts an open source and transparent operating model. Anyone can view its code, participate in project contributions, and make suggestions for improvements. This openness makes Let's Encrypt highly credible in terms of security.

3. How Let's Encrypt works

Let's Encrypt uses the Automated Certificate Management Environment (ACME) protocol to automate certificate application, verification, and renewal. When applying for a certificate, website operators need to send a request to the Let's Encrypt server through the ACME client.

The Let's Encrypt server verifies the website's domain ownership and server control to ensure that the applicant has a legitimate identity and authority. After verification, Let's Encrypt will generate an SSL/TLS certificate and issue it to the applicant. The certificate is usually valid for 90 days, but it can be renewed before expiration through the automatic renewal function.

IV. Application scenarios of Let's Encrypt

Let's Encrypt is suitable for all types of websites, including personal blogs, corporate websites, e-commerce platforms, etc. By using the SSL/TLS certificates provided by Let's Encrypt, websites can implement HTTPS encrypted transmission to protect the security of user data during transmission. In addition, HTTPS can also improve the website's search engine ranking and user experience, and increase users' trust in the website.

In short, as a free, automated and open SSL/TLS certificate provider, Let's Encrypt provides secure and reliable encryption services for global websites. By promoting HTTPS encrypted transmission technology, Let's Encrypt is committed to promoting the security of the global Internet.