A team of developers created their own CA and started signing certificates for all of their IoT devices. Which action will make the browser accept these certificates?
A.
Install a TLS instead of SSL certificate on the IoT devices.
B.
Set the private keys 1024-bit RSA.
C.
Preload the developer CA on the trusted CA list of the browser.
C is correct:
To obtain and activate its identity certificate, the system’s (website) owner needs to enroll with the CA first. Here’s the process:
- The resource’s RSA key pair (public and private) is generated.
- A certificate signing request (CSR) containing identity information and the public key is delivered to a CA. Identity details can include data such as the system name, the organization to which the system belongs, and location information.
- The CA validates the request.
- The CA generates the system’s certificate, which contains these (or more) fields, as per the X.509 standard:
- Serial Number, Subject, Public Key, Key Usage, Not Before and Not After, Issuer, Signature Algorithm, Signature.
- The certificate is delivered back and installed on a system.
IoT devices most likely have not a browser at all, so C does not sound good. But A sounds bad as well. A or C but it depends on exact wording.
C is better
It cannot be A as TLS and SSL certificates are the same thing. A certificate can be used for both TLS and SSL. Note: I'm not saying that TLS and SSL are the same thing.
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