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领域验证
EV 和 OV SSL 证书有什么区别？
OV 验证您的公司名称、地址和注册状态。EV 需要验证以上所有内容，再加上通过独立来源验证法律地位、运营历史、物理地址，以及进行电话回拨。简而言之，OV 证明您的组织存在；EV 证明它是合法的、活跃的且可以联系到的。
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EV SSL 证书值得购买吗？
我可以获得通配符 EV SSL 证书吗？
不可以。CA/Browser Forum 要求 EV 证书上的每个域名都必须进行单独验证，这排除了通配符覆盖的可能性。相反，您可以将子域作为单独的 SAN 添加到多域 EV 证书上，或者将 EV 证书与 DV 或 OV 通配符 SSL 证书配对以覆盖您的子域。
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获取 EV SSL 证书需要多长时间？
通常在有适当文件的情况下需要 1-3 个工作日。拥有法人实体识别码 (LEI) 和公开名录中可验证的电话号码可以缩短此时间。有关完整的分步说明，请参阅上方的验证流程部分。
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EV SSL 证书要花多少钱？
单域名 EV 证书起价为 $75/年（Comodo PositiveSSL EV）。多域名 EV 证书的价格取决于 CA 和域名数量。多年订阅可以进一步降低年度价格，所有购买都包括 25 天退款保证。
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哪种类型的SSL证书最便宜？
Domain Validation (DV). No business documentation, no waiting period. The CA confirms domain control and issues the certificate automatically. The cheapest SSL certificate in the catalog starts at $7.66/yr.
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我在哪里可以以低价购买SSL证书？
Cheap SSL certificates from trusted CAs are available starting at $7.66/yr right here on this page. Browse the product sections above to find the best cheap SSL certificate for your setup, or use the SSL Wizard for a personalized recommendation.
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便宜的SSL证书与昂贵的SSL证书一样安全吗？
Yes. All SSL certificates use the same 256-bit encryption standard. The cost difference reflects the validation level (DV, OV, or EV), warranty amount, and Certificate Authority brand. A $7.66 DV certificate encrypts data in transit identically to one costing several hundred dollars. Affordable and low cost options provide the same protection as premium ones.
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我需要多少个VMC？
You need one VMC per unique base domain and one VMC per unique logo. If you send an email from three domains (example.com, example.net, example.co.uk) using the same trademarked logo, you need three VMCs. If you use two different logos across two domains, you also need two VMCs. Sub-brands or seasonal logo variants may require separate certificates depending on your BIMI configuration.
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为什么 DigiCert 是 Verified Mark Certificate 的正确选择？
DigiCert was the first digital trust provider ever accredited under the BIMI standard and is recognized by every major email client that supports BIMI. Their validation process follows Extended Validation (EV) standards, giving your VMC the highest level of identity assurance. DigiCert VMCs are supported by Gmail, Yahoo Mail, Apple Mail, Fastmail, Zoho Mail, and more.
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