Is OCSP Stapling Good?


Advantages. OCSP Stapling improves the connection speed of the SSL handshake by combining two requests into one. This cuts down on the amount of time it takes to load an encrypted webpage. OCSP Stapling helps maintain the privacy of the end user as no connection is made to the CRL for the OCSP request.

Is OCSP stapling required?

OCSP must-staple

An attacker with a revoked certificate can simply neglect to provide an OCSP response when a browser connects to it and the browser will accept their revoked certificate. In the OCSP fetching case, a soft-fail approach makes sense.

How does OCSP stapling work?

How OCSP stapling works. OCSP stapling is a more efficient way to handle the verification of certificate information. … When a user attempts to visit the site, the digitally time-stamped response is then “stapled” with the TLS/SSL handshake via the Certificate Status Request extension response.

Why is OCSP important?

Basically, OCSP is one of the ways to check the revocation status of an SSL/TLS certificate. When your browser tries to connect to a website’s server, it engages in a process that’s known as an SSL/TLS handshake.

How do you know if OCSP is working?

in the opened dialog box switch radiobutton to OCSP and click Verify. This will return Verified if OCSP is working and certificate is ok. Also you can use ‘certutil -verify -urlfetch’ command to validate certificate and certificate chain. During this test certutil will check certificate revocation status through OCSP.

Is OCSP secure?

The OCSP is an Internet Protocol (IP) that certificate authorities (CAs) use to determine the status of secure sockets layer/transport layer security (SSL/TLS) certificates, which are common applications of X. 509 digital certificates.

Does Chrome use OCSP?

Chrome, for example, does not use OCSP at all, and use its own proprietary mechanism, called CRLSet. The reason for such soft-fail behavior is because unavailable CA servers should not block access to all websites, using their certificates.

What is the difference between OCSP and CRL?

Certificate Revocation List (CRL) – A CRL is a list of revoked certificates that is downloaded from the Certificate Authority (CA). Online Certificate Status Protocol (OCSP) – OCSP is a protocol for checking revocation of a single certificate interactively using an online service called an OCSP responder.

Why is root CA offline?

Keeping the root CA offline will provide separation between the root CA and the rest of the PKI, limiting its exposure. In the event of a intermediate CA being compromised, you can bring the root online to issue a new certificate and revoke all certificates issued by the compromised CA.

How often is OCSP updated?

New Good repsonses are generated approximately daily, but the nextUpdate for them is always 7 days away, so these responses can still be used for purposes like OCSP Stapling for that 7 days even if the server generates a new response in the meantime.

How do you know if your OCSP has been stapled?

Check if OCSP stapling is enabled.

Go to and in the Server Address box, type in your server address (i.e. If OCSP stapling is enabled, under SSL Certificate has not been revoked, to the right of OCSP Staple, it says Good.

What is stapling in security?

From Wikipedia, the free encyclopedia. A stapled security is a type of financial instrument. It consists of two or more securities that are contractually bound to form a single salable unit; they cannot be bought or sold separately.


Which browsers support OCSP stapling?

On the browser side, OCSP stapling was implemented in Firefox 26, in Internet Explorer since Windows Vista, and Google Chrome in Linux, Chrome OS, and Windows since Vista. For SMTP the Exim message transfer agent supports OCSP stapling in both client and server modes.

Is certificate pinning deprecated?

Note: Public Key Pinning mechanism was deprecated in favor of Certificate Transparency and Expect-CT header. … HPKP can circumvent this threat for the HTTPS protocol by telling the client which public key belongs to a certain web server.

What is CRL in security?

A certificate revocation list (CRL) is a list of digital certificates that have been revoked by the issuing certificate authority (CA) before their actual or assigned expiration date. … The CRL file is signed by the CA to prevent tampering.

What is the main benefit of OCSP over CRL?

OCSP (Online Certificate Status Protocol) removes many of the disadvantages of CRL by allowing the client to check the certificate status for a single certificate.

How often is CRL check?

All CRLs have a lifetime during which they are valid; this timeframe is often 24 hours or less. During a CRL’s validity period, it may be consulted by a PKI-enabled application to verify a certificate prior to use.

How does certificate revocation work?

Certificate revocation is the act of invalidating a TLS/SSL before its scheduled expiration date. A certificate should be revoked immediately when its private key shows signs of being compromised. … Here, instead of downloading and parsing the entire CRL, the client can send the certificate in question to the CA.

Does Chrome check certificate revocation?

Google Chrome browser doesn’t check for SSL certificate revocation by default. However, you can turn it on manually in Settings. Here’s how to do it: Visit Chrome’s Settings page (go to Menu > Settings, or enter chrome://settings/ in the address bar)

Does Chrome use CRL?

With an increased number of revocations, there’s the potential that OCSP/CRL responses may start to take a little longer as the Certificate Authorities load up their lists. Whilst Google Chrome does have a form of certificate revocation check, it’s not what you might expect.

Does Safari use OCSP?

Safari. OCSP is supported in Safari on Mac OS X however it is not enabled by default. OCSP can be enabled manually within the Keychain preferences. In Mac OS X 10.7 (Lion), it is enabled by default.

Is OCSP enabled by default?

Online Certificate Status Protocol (OCSP) checking in Advanced Message Security is enabled by default, based on information in the certificates being used.

What does OCSP stand for?

The Online Certificate Status Protocol (OCSP) is the fastest protocol we have for verifying certificate status. In a nutshell, here’s how OCSP works: An end user sends a request to the server, requesting certificate status information.

How do you know your OCSP response?

Testing OCSP with Openssl

  1. Step 1: Get the server certificate. First, make a request to get the server certificate. …
  2. Step 2: Get the intermediate certificate. Normally, a CA does not sign a certificate directly. …
  3. Step 3: Get the OCSP responder for server certificate. …
  4. Step 4: Make the OCSP request.