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How long is a certificate thumbprint?
A certificate thumbprint is an hexadecimal string that uniquely identifies a certificate. A thumbprint is calculated from the content of the certificate using a thumbprint algorithm. CES accepts Secure Hash Algorithm 1 (SHA-1) thumbprints in the 40-digit hexadecimal string form without spaces.
What is a certificate serial number?
The Certificate Serial Number field provides a short form, unique identifier for each Certificate generated by an Certificate Issuer. An Certificate Issuer must ensure that no two distinct Certificates with the same Certificate Issuer DN contain the same serial number.
How do I get my thumbprint certificate?
On the address bar, click Certificate Error and select View Certificates. Click the Details tab. In the list, select Thumbprint. Copy the thumbprint string to your clipboard or to a file so that you can access it when needed.
Is certificate number the same as serial number?
In a certificate, the serial number is chosen by the CA which issued the certificate. It is just written in the certificate. The CA can choose the serial number in any way as it sees fit, not necessarily randomly (and it has to fit in 20 bytes).
Where can I find the thumbprint of a certificate?
The thumbprint is dynamically generated using the SHA1 algorithm and does not physically exist in the certificate. Since the thumbprint is a unique value for the certificate, it is commonly used to find a particular certificate in a certificate store. Applies to How to get SSL certificate fingerprint and serial number
What is the serial number of a certificate?
The serial number is a unique identifier assigned by the Certificate Authority to the certificate and the thumbprint is a hash of the certificate data. A signature contains a message digest of the signed data (you can see it in form), signed with the private key of the sender.
What is the serial number of a digital signature?
A digital signature does not have a recognizable identifier. You are seeing in the two forms the serial number of the certificate. The serial number is a unique identifier assigned by the Certificate Authority to the certificate and the thumbprint is a hash of the certificate data.
Can You renew a certificate with the same thumbprint?
Since the thumbprint is a hash of the certificate in binary DER encoding this will not work if your certificate is stored in any other format than DER. So now we have the answer to why you cannot request a new certificate, or renew an existing one, with the same thumbprint.