A method of securing radio communication between a ramp agent and an aircraft provided with a base station adapted to transmit a beacon signal, the method comprising the steps of: - establishing a first database identifying organizations such as aircraft operators and service providers that employ ramp agents who might establish radio communication with an aircraft of at least one of the aircraft operators, and, for each aircraft operator, identifying the organizations that it authorizes to be able to have their ramp agents establish radio communication with any of its aircraft; - for each organization, establishing a second database identifying its employed ramp agents and associating biometric data with each ramp agent; - providing the ramp agent with a terminal including reader means for reading biometric data and adapted to enter into radio communication with the aircraft; - incorporating aircraft identification information in the aircraft beacon signal; - when attempting to establish communication between the ramp agent and an aircraft that the agent has selected after identifying it by using the beacon signal received by the terminal, performing a first check using the biometric data reader means to enable the terminal to identify the ramp agent who using the terminal by comparison with biometric data extracted from the second database, and to deduce therefrom the agent's employer organization; - if the first check is positive, performing a second check, making use of information extracted from the first database, to verify that the ramp agent's employer organization is the aircraft operator itself or one of the organizations it has authorized; and - if the second check is positive, establish a connection allowing radio communication between the ramp agent and the aircraft. - establishing a first database identifying organizations such as aircraft operators and service providers that employ ramp agents who might establish radio communication with an aircraft of at least one of the aircraft operators, and, for each aircraft operator, identifying the organizations that it authorizes to be able to have their ramp agents establish radio communication with any of its aircraft; - for each organization, establishing a second database identifying its employed ramp agents and associating biometric data with each ramp agent; - providing the ramp agent with a terminal including reader means for reading biometric data and adapted to enter into radio communication with the aircraft; - incorporating aircraft identification information in the aircraft beacon signal; - when attempting to establish communication between the ramp agent and an aircraft that the agent has selected after identifying it by using the beacon signal received by the terminal, performing a first check using the biometric data reader means to enable the terminal to identify the ramp agent who using the terminal by comparison with biometric data extracted from the second database, and to deduce therefrom the agent's employer organization; - if the first check is positive, performing a second check, making use of information extracted from the first database, to verify that the ramp agent's employer organization is the aircraft operator itself or one of the organizations it has authorized; and - if the second check is positive, establish a connection allowing radio communication between the ramp agent and the aircraft.