国密SSL证书在等保（网络安全等级保护）和密评（商用密码应用安全性评估）中的应用主要体现在以下几个方面：

1. 助力等保合规建设：
   国密SSL证书遵循国密SSL协议，采用SM2/SM3国密算法，实现Web访问客户端到服务器端的HTTPS加密传输，并验证通信方的真实身份。这确保了通信网络数据传输的完整性和加密性，满足二级等保安全通信网络设计技术要求，助力二级等保合规建设。
2. 助力密评合规：
   根据《商用密码应用安全性评估管理办法》，网络与信息系统的运营者应当使用商用密码进行保护，并每年至少开展一次商用密码应用安全性评估。国密SSL证书满足密评的网络和通信安全相关密码应用技术要求，可助力过密评。
3. 落实等保2.0、关保安全通信设计要求：
   国密SSL证书通过SSL/TLS协议的加密认证机制，建立安全的网络连接并校验通信方的真实身份，实现网络传输的保密性、完整性，确保通信双方身份可信。这有助于等保二级及以上信息系统以及关键信息基础设施信息系统满足等保2.0安全通信设计要求。
4. 落实密码应用合规要求：
   国密SSL证书遵循国家标准技术规范并参考国际标准，支持SM2/SM3/SM4国产密码算法和国密安全协议。在密评中，通过使用国密SSL证书，可以确保系统采用的密码算法和技术符合国家标准和法规要求，满足商用密码应用的合规性要求。
5. 提升网络信息系统的安全性：
   国密SSL证书的应用不仅能够提升网络信息系统的安全性，同时满足我国网络安全和密码应用的各项法规要求。
6. 双证书部署全球信任：
   为解决国密算法在HTTPS加密应用中的兼容性问题，相关企业可以优选国密SM2/国际RSA双证书，既可满足国密合规要求，又可实现全球通用。

综上所述，国密SSL证书在等保、密评中的应用，对于确保网络通信安全、数据传输的保密性和完整性、以及满足国家法律法规要求方面发挥着重要作用。

Yes, you can purchase multi domain SSL certificates on 45SSL.com. According to search results, the multi domain SSL certificate provided by 45SSL.com can contain up to 300 domain names, including www and @ domains
This means that you can protect multiple websites or subdomains with one certificate, without the need to purchase separate certificates for each domain, saving costs and simplifying the management process.

the SSL certificate offered by 45SSL.com starts at 45 yuan, which is a very competitive price. Therefore, it can be considered that 45SSL.com does not have a minimum order amount, and users can directly purchase a single SSL certificate for 45 yuan.

45SSL.com supports the following payment methods:

1. USDT (Tether): 45SSL.com supports payment using the cryptocurrency USDT, which is a popular stablecoin pegged to the US dollar and provides users with another payment option.
2. • • Customer Service Telegram Transactions : Customers can make payments by adding their customer service Telegram account @ KeKeSSL , indicating that 45SSL.com may support transactions through direct Telegram transfers.

Please note that payment methods may be updated or changed over time. It is recommended to contact 45SSL.com customer service directly before purchasing to obtain the latest payment method information.

Purchasing an SSL certificate from 45SSL.com involves a few straightforward steps. While I can provide a general guide, please note that the exact process may vary slightly depending on the website's current layout and features. Here's how you can typically purchase an SSL certificate from 45SSL.com:

Step 1: Visit the Website

Go to the 45SSL.com website using your preferred web browser.

Step 2: Browse SSL Certificates

Look for the section that lists the different types of SSL certificates available. They usually categorize them based on the level of validation (Domain Validation - DV, Organization Validation - OV, Extended Validation - EV), and the number of domains they cover (single, multi-domain, wildcard).

Step 3: Select the Certificate

Choose the SSL certificate that best fits your needs. Consider factors like the number of domains, the level of trust (indicated by the type of validation), and the price.

Step 4: Add to Cart

Once you've selected the appropriate SSL certificate, click on the "Add to Cart" or similar button to add the certificate to your shopping cart.

Step 5: Review Your Cart

Navigate to your shopping cart to review the SSL certificate you've selected. Ensure that it's the correct one for your needs.

Step 6: Checkout

Click on the "Checkout" or "Proceed to Payment" button to start the payment process.

Step 7: Provide Information

Fill in the required information, which typically includes:

• Your personal or company details
• Payment information
• Domain name(s) for which the SSL certificate will be issued

Step 8: Complete the Payment

Choose your preferred payment method and complete the transaction. 45SSL.com likely supports various payment options, including credit cards, PayPal, or other online payment services.

Step 9: Receive the Certificate

After the payment is confirmed, you will receive the SSL certificate. This is usually delivered via email or can be downloaded directly from your account on the 45SSL.com website.

Step 10: Install the Certificate

Follow the instructions provided by 45SSL.com to install the SSL certificate on your server. If you need help, their support team should be able to assist you with the installation process.

Step 11: Verify Installation

Once installed, verify that the SSL certificate is working correctly by accessing your website using HTTPS and checking for the padlock icon in the address bar of your web browser.

Remember to check the website for any specific instructions or additional steps, as the process might have been updated since my last training data. If you encounter any issues or have questions, don't hesitate to reach out to 45SSL.com's support team for assistance.