OCSP stapling
There are two challenges with OCSP. The first aspect is the privacy part and the second aspect is the slowness part.
Challenge 1
When a browser sends an OCSP request to the CA servers, the CA will know which client is accessing which domain. This may breach the privacy part. This is illustrated in the following diagram:

- A web server has sent its Certificate to the user.
- The users query the OCSPResponder to check if the Certificate for the Domain is Valid or not.
- The OCSPResponder responds, depending on the status.
In the backend, the OCSPResponder can also store the IP of the client and the Domain it is accessing. This can give great detail as to who is accessing which website as well as many other details.
Challenge 2
If the client fails to connect to the OCSP responders due to some reason, the client can choose few inbuilt options, and none of them are desired.
An ideal solution
When OCSP stapling is enabled, the web server itself will query the OCSP server and will cache the response...