通配符 SSL 又叫泛域名证书，可以保护一个域名以及该域名所有的二级或者三级子域名，不限制子域名数量，且添加新的子域名无须重新审核和另外付费，节约了大量的时间和金钱成本。例如，一个单独的通配符证书就可以保护 certbase.com、blog.certbase.com 和 store.certbase.com。通配符证书可以保护通用域名和您在提交申请时指定的级别下的所有子域。只需在通用域名左侧的子域区域添加星号 (*) 即可。适用对象主要为银行、保险、金融机构、电子商务网站、大型企业等。
Secure Site 企业级 SSL/TLS 证书（中国OCSP）专为中国互联网设计，可以保护无限二级子域名，支持 RSA 和 ECC 算法，支持多域名，一张证书中您可以随时增加其他单域名或者通配符域名，最多可以增加到 250 个域名
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