Methods, control devices and vehicles for authentication of transport missions

A method for enabling authentication of transport missions, performed in a control device of a member of a group comprising a plurality of autonomous vehicles and an off-board system. Each member in the group comprises a cryptographic function known by all other members. The method comprises signing, using the cryptographic function, information defining at least one transport mission to be performed by at least one of the autonomous vehicles in the group; and sending the signed information to a plurality of the other members of the group, in order to request them to authenticate the transport mission. The disclosure also relates to a corresponding method for authenticating transport missions, to control devices implementing the methods, to computer programs, to computer-readable storage mediums, and to autonomous vehicles.