What Is Intermediate Certificate?

The intermediate certificate is a certificate that was issued as a dividing layer between the Certificate Authority and the end user’s certificate. It serves as a verification device that tells a browser that a certificate was issued on a safe, valid source, the CA’s root certificate.

Which certificate is root and which is intermediate?

  • Certificate 1 is your end-user certificate, the one you purchase from the CA. The certificates from 2 to 5 are called intermediate certificates. Certificate 6, the one at the top of the chain (or at the end, depending on how you read the chain), is called root certificate.

How do I get an intermediate certificate?

One of the simplest ways to find the intermediate certificate and export it is through an Internet Browser such as Google Chrome. Browse to the website that you need to get an intermediate certificate for and press F12. Browse to the security tab inside the developer tools. Click View certificate.

How do I know if my certificate is intermediate?

An intermediate certificate is a root certificate that has been signed by another root certificate. The issuer distinguished name of the intermediate root certificate will show who signed it. If the IDN and SDN are the same and the certificate is on the CERTAUTH acid, it is the root certificate.

Do I need an intermediate certificate?

The intermediate certificate is one (or more) between the one in your trust store and the one published on the server. The CA you obtained your SSL certificate from should have provided this for you (usually a ‘cabundle’ file). This needs to be installed on the server.

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Why are there intermediate certificates?

All major Certificate Authorities use intermediate certificates because of the additional security level. This helps to minimize and compartmentalize damage in the event of a mis-issuance or security event.

How many certificates are in the certificate chain?

Ideally, you should promote the certificate that represents your Certificate Authority – that way the chain will consist of just two certificates.

What is OCSP response?

The Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X. The “request/response” nature of these messages leads to OCSP servers being termed OCSP responders. Some web browsers use OCSP to validate HTTPS certificates.

What is the difference between signer certificate and personal certificate?

Personal certificates contain a private key and a public key. We can extract the public key, called the signer certificate, to a file, then import the certificate into another keystore. During an SSL connection, the server sends it’s personal certificate to the client.

What is the difference between root certificate and intermediate certificate?

A Root CA is a Certificate Authority that owns one or more trusted roots. Intermediate CAs or Sub CAs are Certificate Authorities that issue off an intermediate root. They do not have roots in the browser’s trust stores, instead their intermediate roots chain back to a trusted third-party root.

Why do websites use digital certificates?

Websites use digital certificates for domain validation to show they are trusted and authentic. Digital certificates are used in secure email to identify one user to another and may also be used for electronic document signing. The sender digitally signs the email, and the recipient verifies the signature.

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What is the use of client certificate?

In cryptography, a client certificate is a type of digital certificate that is used by client systems to make authenticated requests to a remote server. Client certificates play a key role in many mutual authentication designs, providing strong assurances of a requester’s identity.

What type of certificate is most often used in modern PKI?

Common Uses of Certificates The most familiar use of PKI is in SSL certificates. SSL (Secure Sockets Layer) is the security protocol used on the web when you fetch a page whose address begins with https:.

How do you pin a certificate?


  1. The client initiates a handshake with the server and specifies a Transport Layer Security (TLS) version.
  2. The server responds with a certificate and public key.
  3. Then, the client verifies the certificate or public key and sends back a shared key.
  4. Next, the server confirms receipt of the shared key.

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