Single SSL certificates offer a fast and cost-effective way to secure a single domain, both WWW and non-WWW versions. Along with providing full encryption for a single domain, this type of SSL can also secure an individual subdomain, hostname, or mail server.
Brand: PositiveSSL from Sectigo, while PremiumSSL is from Certum
Domain TLDs: PositiveSSL supports normal TLDs. PremiumSSL supports normal TLDs plus additional domains like .af, .zw, .sl.
Certificate Encryption Strength: 256-bit
CSR/KEY Size: 2048-4096 bits
Cryptographic Algorithm: RSA SHA-2 and ECC
Validation Methods: Email, File, or DNS validation available
Issuance Time: 5 minutes or less
Browser Compatibility: 99.99% compatibility with all browsers, mobile devices, server software, and internet infrastructure components
Reissuance: Unlimited
Server Licenses: Unlimited
Site Seal: Yes
SEO: SSL boosts search engine rankings
Refund Policy: 30-Day Money-Back Guarantee
Billing Cycle Notes: With a multi-year billing cycle, you can save more. For security and industry standards, each SSL certificate is issued with a 1-year term and needs to be reissued annually.
SSL证书用于验证网站的身份，并通过SSL/TLS协议来保障连接安全。它可以实现服务器与浏览器之间的加密通信，启用HTTPS，并在浏览器中显示安全锁标志（????）。由像Sectigo这样的受信任证书颁发机构（CA）签发的SSL证书，可以确保网站的真实性和安全性。
订单成功提交后，您可以在客户后台进行配置。完成配置和验证后，您可以在账户的产品页面下载您的SSL证书。详细指南请参见：如何签发SSL证书？
PositiveSSL 支持常规 TLD（顶级域名），而 PremiumSSL 除了支持常规 TLD 外，还支持 .af、.zw、.sl 等域名。
