Openssl command to verify authenticity of CA Issuer? And the "magic" behind it? [duplicate]

I am not confident in my understanding of Certificate Authority and signing certificates. I’m wondering how do you verify the authenticity of an issuer when inspecting an entity certificate.
Here’s the scenario that I am using to improve … Continue reading Openssl command to verify authenticity of CA Issuer? And the "magic" behind it? [duplicate]

3 ways to achieve crypto agility in a post-quantum world

Working at the speed of digital business is a constant challenge. But in today’s increasingly automated operational environment, crypto agility—i.e., an organization’s ability to (at the moment of compromise) switch rapidly and seamlessly between certi… Continue reading 3 ways to achieve crypto agility in a post-quantum world

How is issuing a certificate revocation response different from re-issuing the certificate itself?

I am reading about how certificates work in the context of X.509, SSL/TLS/HTTPS. According to Wikipedia, the client (e.g. a browser) is supposed to check the revocation status for each non-root certificate as a part of certification path v… Continue reading How is issuing a certificate revocation response different from re-issuing the certificate itself?

Criteria for Common Name of Certificate Authority and how it affects SSL certificates

It is not clear to me how the Common Name affects a certificate authority and the certificates that are ultimately created. For example, I have this simple script that creates some files for a certificate authority auto-generated/ca.* and… Continue reading Criteria for Common Name of Certificate Authority and how it affects SSL certificates

Other benefits of creating my certificate authority aside from the firefox issue and centralized management of certificates?

I’ve been trying to read more about self-signed SSL certificates versus creating my own certificate authority to sign SSL certificates. I am still not completely clear on this.
I’ll start by explaining my use case: I have customers that … Continue reading Other benefits of creating my certificate authority aside from the firefox issue and centralized management of certificates?

Why openssl verify does not work for the certificate chain of a correctly configured site?

I download its certificates. To do that, I used the openssl debug output of the command
openssl s_client -connect security.stackexchange.com:443 -servername security.stackexchange.com -showcerts -debug </dev/null 2>&1|tee out

Th… Continue reading Why openssl verify does not work for the certificate chain of a correctly configured site?

SSL Certificates signed by our CA show as invalid in browser

We’re experiencing an issue, where SSL server-certificates issued by our own internal PKI will show as invalid in the browser, when accessing the site.
The error is NET::ERR_CERT_INVALID (Tested in Edge and Chrome). IE shows Mismatched Add… Continue reading SSL Certificates signed by our CA show as invalid in browser

Support for domain-specific root CAs in X.509 certificate format, OS and browsers

Chance is one gets an invalid certificate warning when one follows this link https://www.cnss.gov. As explained there (same warning) this is on purpose, and the solution is supposed to be to install1 extra root Certification Authority cert… Continue reading Support for domain-specific root CAs in X.509 certificate format, OS and browsers