啟用HTTPS會讓我們的網站更加安全，今年百度也曾明確表示HTTPS是大勢所趨，建議我們使用https，旨在讓每個網站都啟用HTTPS加密的 Let's Encrypt CA 宣布將於2018年1月免費提供通配符證書（Wildcard certificate）。通配符證書是一種可被多個子域使用的公鑰證書。這意味著，單個證書可用於提供多台服務器或一台服務器托管的多個子域名的網頁加密，顯著降低了個人和小型企業采用HTTPS的門檻。
Let's Encrypt 表示，它希望通配符證書能幫助 Web 加快實現100%HTTPS，Let's Encrypt 前不久剛剛宣布簽發了一億個證書。
Let's Encrypt官方原文如下：
Let’s Encrypt will begin issuing wildcard certificates in January of 2018. Wildcard certificates are a commonly requested feature and we understand that there are some use cases where they make HTTPS deployment easier. Our hope is that offering wildcards will help to accelerate the Web’s progress towards 100% HTTPS.
Let’s Encrypt is currently securing 47 million domains via our fully automated DV certificate issuance and management API. This has contributed heavily to the Web going from 40% to 58% encrypted page loads since Let’s Encrypt’s service became available in December 2015. If you’re excited about wildcard availability and our mission to get to a 100% encrypted Web, we ask that you contribute to our summer fundraising campaign.
A wildcard certificate can secure any number of subdomains of a base domain (e.g. *.example.com). This allows administrators to use a single certificate and key pair for a domain and all of its subdomains, which can make HTTPS deployment significantly easier.
Wildcard certificates will be offered free of charge via our upcoming ACME v2 API endpoint. We will initially only support base domain validation via DNS for wildcard certificates, but may explore additional validation options over time. We encourage people to ask any questions they might have about wildcard certificate support on our community forums.
We decided to announce this exciting development during our summer fundraising campaign because we are a nonprofit that exists thanks to the generous support of the community that uses our services. If you’d like to support a more secure and privacy-respecting Web, donate today!
We’d like to thank our community and our sponsors for making everything we’ve done possible. If your company or organization is able to sponsor Let’s Encrypt please email us at sponsor@letsencrypt.org.
相關內容：
- 【官方說法】關於HTTPS的常見問題（系列一）
- 百度搜索對HTTPS站點全流程支持方案
- 網站如何實現HTTPS訪問？