What exactly is a Wildcard Certificate?

Let’s start with a definition. A wild card testament is essentially a public key endorsement that can be used across multiple sub domains. For example, a wild card testament provided for https://*.examplecompany.com could be used to obtain all subdomains, for example,



Nonetheless, because the mark does not match full stops, wild card endorsements only cover a single level of subdomains. The domain resources.blog.keyfactor.com would be insignificant for the declaration. Neither is the bare domain keyfactor.com covered, which should be included as a separate Subject Alternate Name.

The Benefits of Wildcard Certificates

Wildcard SSL certificate declarations can be extremely useful for organizations attempting to obtain various subdomains while looking for adaptability. The following are essential characteristics of wild card endorsements:

Secure an unlimited number of subdomains: A single special case SSL authentication can cover an unlimited number of subdomains without requiring a separate testament for each subdomain.

The board’s endorsement is simple: Deploying and managing truly individual SSL certificates for an expanding number of public-facing spaces, cloud jobs, and gadgets is a difficult task. Special case authentications make declaration administration a breeze.

Funds for low-cost investment: Although the cost of providing a wild card declaration is higher than that of an ordinary SSL endorsement, it is a viable option, particularly when you consider the total cost expected to get all of your subdomains by their own testament.

Security Risks That Will Make You Doubt Yourself

Special case testaments are used to cover all recorded areas with the same private key, making it easier to make due. Regardless of the benefits, the use of special case testaments poses critical security risks because a similar private key is used across disparate frameworks, increasing the risk of an association-wide split the difference.

A faulty link

If the private key of a traditional SSL endorsement is compromised, only the associations with the single server recorded in the testament are impacted, and the harm is easily remedied. The private key of a wild card endorsement, on the other hand, is a solitary place of an all-out split the difference. If the key is compromised, all secure connections to the servers and sub domains listed in the endorsement will be jeopardized.

Private key protection

The preceding point raises another issue: how would you successfully and safely manage that private key across so many distributed servers and groups? In practice, taking or misusing private keys is a major driver for masking aggressors’ impressions and making them appear genuine. By gaining access to private key of a special case declaration, attackers can impersonate any space covered by wild card authentication. Similarly, cybercriminals can use a compromised server to create vindictive locations for phishing attempts. It only takes one server to be compromised for all the others to be rendered helpless.

Renewal Possibilities

If the wild card authentication is turned off, the private key on all servers that use that declaration should be updated. Furthermore, this update should occur all at once to avoid disrupting the smooth flow of information. A similar situation arises when the special case testament expires.

The Importance of Visibility and Automated Renewal

Before deciding whether to use wild card endorsements, you should define the objectives that will be met by sending these declarations. In a few limited circumstances, Wild card endorsements can have a significant use case.