The document provides explanations about the serial number and validity period of an X509 certificate. It mentions that the serial number is a unique identifier assigned by the issuer, with a valid range between 1 and 2147483647. The validity period is the number of days the certificate is valid from issuance, with a standard period of 20 years for certificates issued by Assistente Certificato.
documents/EFTA00289910.pdf
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