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Extended Validation (EV) 证书是目前最高信任级别的 SSL 证书。通过极其严格甚至苛刻审查网站企业身份和域名所有权，确保网站身份的真实可靠，是您最值得信赖的 SSL 证书。与DV SSL 证书、OV SSL 证书相比，EV SSL 证书具有最高级别可信度及安全性，显示带公司名称的绿色地址栏从而使访问者更加确信以及更加放心的相信他们所进行交易的网站是真实合法的，提升在线交易量。EV 证书价格较为昂贵，并且需要 CA 机构人工验证组织和电话信息。签发时间在 1 – 5 个工作日不等。EV 证书在浏览器地址栏中显示绿条 (Green Bar)，向访问者展示组织信息。一般用于在线交易网站、大型企业或受信组织。
EV SSL证书 (扩展验证型数字证书)为网站提供最高等级的加密和保护功能，用户在访问网站时，能够在浏览器的绿色地址栏上直接显示企业信息，有效的防止了流量劫持和网站钓鱼。EV SSL证书的颁发流程也是所有证书类型中最为复杂，但也拥有最高等级的信誉度。EV数字证书是金融类企业以及大型企业官网加密首选。
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