Network > Protocol Settings > Generating and Confirming a Key Pair and Device Signature Certificate and User Certificate for Adding Digital Signatures to PDF Files > Confirming a Key Pair and Device Certificate
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Confirming a Key Pair and Device Certificate

The following procedure describes how to confirm a key pair and device certificate generated/updated in "Setting a Key Pair and Device Certificate."

  1. On the TCP/IP Settings screen, press [Certificate Settings] → [Key and Certificate List] → [Key and Certificate List for this Machine].

If (invalid) is displayed to the left of a key pair, the key pair is corrupted or invalid. Follow the procedure in "Setting a Key Pair and Device Certificate," to generate/update a key pair.

  • You cannot delete or edit a key pair necessary for a device signature on the Key and Certificate List for this Machine screen.
  1. Select 'Device Signature Key' → press [Certificate Details] → [Certificate Verification].

If [Certificate Verification] is grayed out or <The key is corrupted or invalid.> is displayed, you cannot use the key pair. Follow the procedure in "Setting a Key Pair and Device Certificate," to generate/update a new key pair.

  • <Certificate Thumbprint> contains sender information used to validate the reliability of a PDF with a device signature, by matching it with the MD5 or SHA-1 message digest number.
  • The expiration date for the device signature is set to 5 years after its key pair was generated/updated.

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