Translate the following English sentence to French:
"Therefore, an attempt was made during the complex negotiations between the Commission and the United States Department of Commerce to find a solution which would allow the transfer of data to those private companies which voluntarily submit to a self-regulation system known as the 'safe harbour' system."
Dès lors, au cours des négociations entre la Commission et le département américain du Commerce, on a cherché une solution permettant le transfert des données aux sociétés privées qui se soumettent volontairement à un système d'autoréglementation dit du "port sûr".