How PGP encryption works for HDL import via API?

Summary:

This is the reference: https://docs.oracle.com/en/cloud/saas/human-resources/24b/tutorial-hdl-rest/#Upload-Data-with-HCM-Spreadsheet-Data-Loader

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Can someone please explain me how to perform a PGP encryption and description while sending HDL file?

I suppose transmitted data should be encrypted before sending data to Oracle web content server.

Once the file is saved in web content server a second API call should be performed to process it but how should we decrypt it? This is not clear

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