AWS Cloud Crypto services enables to stay secure in the AWS Cloud and to leverage AWS services and tools.
The Public Key Infrastructure has provided security to servers and load balancers since the beginning of the Internet through digital certificates.
A wildcard certificate (like SSL/TLS) is a public key certificate that can protect several subdomains inside a domain and is usually acquired from a trustworthy public Certificate Authority (CA).
Public Key Infrastructure is a solution created to protect your infrastructure, where signed certificates and hashes are used for identification and authentication.