The document provides information about the serial number and validity period of an X509 certificate. It explains that the serial number is assigned by the certificate issuer and is used to distinguish the certificate from others. The serial number must be between 1 and 2147483647. The validity period of an X509 certificate is the number of days from issuance during which the certificate is valid, with a maximum validity of 20 years for certificates signed by the Certificate Wizard.
documents/EFTA00289920.pdf
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