Method for processing a data packet to the issuance, processing method of a data packet to reception, devices and equipment associated nodes

The invention relates to a method for processing a data packet to its reception, said data packet having been transmitted by a first node equipment to a second node device on a link of an electronic communications network wireless , said packet including a header and payload. According to the invention, the method comprises the following steps, implemented by the second node equipment, on receipt of a header of said data packet: - detection (R2) of a link authentication preamble in received preamble; Authentication (R4) of the link with the detected authentication preamble. - Decision (R5) for receiving the payload of the data packet depending on the result of authentication.