A wildcard certificate is a certificate that can secure a domain and multiple subdomains under a wildcard naming pattern. It matters because broader certificate scope can reduce operational friction but also concentrates trust in fewer credentials.
What is Wildcard Certificate?
Wildcard certificates are often used to simplify certificate management for many related subdomains. That convenience can be useful, but it also increases the blast radius if the associated private key is compromised.
What Wildcard Certificate Commonly Supports
Common uses include broad TLS coverage for related services, simplified certificate operations, and web platform management across multiple subdomains.
Wildcard Certificate vs. Single-Name Certificate
A wildcard certificate covers a broader naming pattern. A single-name certificate binds trust to one specific hostname.
Frequently Asked Questions
Why use a wildcard certificate?
Because it can simplify certificate management across many related subdomains.
What is the main downside?
A single key can end up protecting many services, which raises the impact of key compromise.
Related Cybersecurity Terms
