I would like to know, if renewing a SSL certificate will change my thumbprint? The certificate has expired.
If it can be same then under what conditions can it remain same.
Many thanks in advance.
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It depends on what fingerprint you mean.
Fingerprint for Public Key Pinning stays the same if you renew the cert with the same private key you used before. See this page for instructions how to generate the fingerprint, you can see it can be extracted from private key or CSR, not only from the cert itself.