Revoked Certificates - CRL and OCSP

Q

What are CRL (Certificate Revocation List) and OCSP (Online Certificate Status Protocol)? I want to know how to determine if an X.509 digital certificate has been revoked or not.

✍: FYIcenter.com

A

Here is a collection of tutorials on CRL (Certificate Revocation List) and OCSP (Online Certificate Status Protocol) compiled by FYIcenter.com team.

OCSP (Online Certificate Status Protocol)

What Is OCSP (Online Certificate Status Protocol)

Find OCSP Server URL of Certificate CA

8gwifi.org OCSP Test Tool

CRL (Certificate Revocation List)

What Is CRL (Certificate Revocation List)

Retrieve CRL File from Certificate CA

Open and View CRL File

CRL File Format and Fields

Certificate Revocation Reason Codes

Examples of Revoked Certificates

DigiNotar Fraudulent Certificates

"Hosted by GTI Group Corporation" Certificates

Other Examples of Revoked Certificates

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â‡’ OCSP (Online Certificate Status Protocol)

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Open and View CRL File
How to open and view a CRL (Certificate Revocation List) file? I just downloaded a CRL from the certificate's CA Website. If you want to open and view the list of revoked certificates in CRL (Certificate Revocation List) file you can follow this tutorial. 1. Open the certificate by double-click the ... 2019-07-19, ≈14🔥, 0💬

CRL File Format and Fields
What is the format of a (Certificate Revocation List) CRL file? I just downloaded a CRL from the certificate's CA Website. The format of a CRL (Certificate Revocation List) file is specified in the X.509 v2 standard, which can be summarized below. A CRL file is consists of two main parts: 1. CA Info... 2019-07-19, ∼7075🔥, 0💬

What Is CRL (Certificate Revocation List)
What is CRL (Certificate Revocation List)? A CRL (Certificate Revocation List) is a digitally signed file containing a list of revoked X.509 digital certificates. After a CA (Certificate Authority) has issued a digital certificate for a public key of a given entity, it may decide to revoke this cert... 2019-07-19, ∼6410🔥, 0💬

Retrieve CRL File from Certificate CA
How to retrieve the CRL from the certificate's CA? I want to verify if the certificate has been revoked or not. If you want to retrieve the CRL from the certificate's CA to validate the revocation status of a certificate, you can follow this tutorial. 1. Open the certificate by double-click the cert... 2019-07-19, ∼5902🔥, 0💬

CRL (Certificate Revocation List)
Where to find answers to frequently asked questions on CRL (Certificate Revocation List)? Here is a collection of tutorials on CRL (Certificate Revocation List) compiled by FYIcenter.com team. What Is CRL (Certificate Revocation List) Retrieve CRL File from Certificate CA Open and View CRL File CRL ... 2016-11-06, ∼5270🔥, 2💬

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"DigiNotar Root CA" Not Trusted in Mozilla Firefox 47
Why "DigiNotar Root CA" certificate is shown as "not trusted" in Mozilla Firefox 47? It seems be a root CA. "DigiNotar Root CA" used be a trusted root CA. But as of September 2011, it's root CA status has been revoked due to a security breach that resulted in the fraudulent issuing of certificates b... 2019-07-19, ∼4965🔥, 0💬

Add Certificate Validation Exception in Mozilla Firefox 9
Can I continue to use the Web site, even if it has the "This Connection is Untrusted" error? Normally, you should not continue to use the Web site, if it has the "This Connection is Untrusted" error. But if you don't plan to exchange any sensitive data with the site, you can continue to use it as sh... 2016-08-30, ∼4528🔥, 0💬

View/Remove Certificate Exceptions in Mozilla Firefox 47
How to view certificate exceptions that I have added in the past in Mozilla Firefox 47? I want to remove some of them. Each time you add a certificate exception for a website in Mozilla Firefox 47, the invalid certificate of the website is added to Mozilla Firefox 47 under the "Servers" certificate ... 2016-08-30, ∼4391🔥, 0💬

"This Connection is Untrusted" Error in Mozilla Firefox 9
Why I am getting the "This Connection is Untrusted" error screen in Mozilla Firefox 9? You will see the "This Connection is Untrusted" error screen in Mozilla Firefox 9, if Mozilla Firefox failed to validate the server certificate provided by the Web site you are visiting. One of the reason for the ... 2016-08-30, ∼3752🔥, 0💬

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