Do we need SSL for subdomain?
Yes, now you don’t have to buy separate SSL certificates for all your subdomains and go through the verification process, CSR generation, installation and renewal for each of them separately. Thanks to the wildcard SSL certificate.
What is the purpose of SSL pinning?
SSL pinning allows the application to only trust the valid or pre-defined certificate or Public Key. The application developer uses SSL pinning technique as an additional security layer for application traffic. As normally, the application trusts custom certificate and allows the application to intercept the traffic.
What does it mean to use public key pinning in http?
HTTP Public Key Pinning (HPKP) is a now-deprecated Internet security mechanism delivered via an HTTP header which allows HTTPS websites to resist impersonation by attackers using misissued or otherwise fraudulent digital certificates.
What happens when you pin a certificate to a public key?
Pinning effectively removes the “conference of trust”. An application which pins a certificate or public key no longer needs to depend on others – such as DNS or CAs – when making security decisions relating to a peer’s identity.
How to implement public key pinning in OpenSSL?
To implement this, following Public key Pins header should be included in the response to the client. The value of this parameter should contain the base 64 encoded value of Subject Public Key Information (SPKI). To generate the SPKI from the certificate we can use OpenSSL Here tls.crt is the location of the certificate file.
How to generate a public key for a web server?
When ever a web server needs to get a certificate, they should generate a public key and send their organization details along with this key to a CA. This process is known as a Certificate Signing Request. The CA will investigate the details and after confirming the legitimacy of the server, it will sign the certificate.