While you compress your file, your work is being signed by PKZIP.
The last step is to copy the attributed key of the CRC signature (8th column, here 6e881552)
to the Signature field of the IDDN referencing form.
(you may do it by copy/paste)
here "6e881552" is the signature key
ATTENTION : keep your zipped file carefully with the certificate attributed by INTERDEPOSIT