Alarm method executed by a security platform in a first network, comprising at least one first gateway (Gat) for communication with at least one first terminal (Ter) in a mobile environment, by a second telecommunications network, characterised in that it comprises at least: - a step of establishment of a communication between the first terminal (Ter) and the security platform, comprising the transmission, by the first terminal, of data representative of a specific context of use comprising at least data representative of at least one state of at least one sensor of the first terminal, - a step of initialisation of at least one alarm session of the platform, initialised as a function of the context of use, the alarm session comprising at least one evaluation module evaluating at least one first alarm variable associated with the first terminal, - a step of initialisation of a first monitoring module of the platform, initialised as a function of the context, the first monitoring module setting the first alarm variable evaluated in a state representative of the state of a sensor of the first terminal, - a step of initialisation of at least one alarm transmission module, associated with the context, controlled as a function of the evaluation module and triggering, during its activation, at least the transmission of an alarm message, by one of the networks, towards a server (Ser) of the network, - a step of activation of the alarm session and the evaluation module thereof, carried out concomitantly with the storage, by a learning module, of sequences of computer-based events representative of the states of the evaluation, monitoring and alarm transmission modules, phase matched with the states of at least one first alarm variable, - a step of transmission of data for setting of the first alarm variable evaluated, by the first terminal executing a first data transmission program, - a step of activation of the alarm transmission module when the evaluation module detects a state of emergency, the first alarm variable being set to a state representative of a state of emergency. - a step of establishment of a communication between the first terminal (Ter) and the security platform, comprising the transmission, by the first terminal, of data representative of a specific context of use comprising at least data representative of at least one state of at least one sensor of the first terminal, - a step of initialisation of at least one alarm session of the platform, initialised as a function of the context of use, the alarm session comprising at least one evaluation module evaluating at least one first alarm variable associated with the first terminal, - a step of initialisation of a first monitoring module of the platform, initialised as a function of the context, the first monitoring module setting the first alarm variable evaluated in a state representative of the state of a sensor of the first terminal, - a step of initialisation of at least one alarm transmission module, associated with the context, controlled as a function of the evaluation module and triggering, during its activation, at least the transmission of an alarm message, by one of the networks, towards a server (Ser) of the network, - a step of activation of the alarm session and the evaluation module thereof, carried out concomitantly with the storage, by a learning module, of sequences of computer-based events representative of the states of the evaluation, monitoring and alarm transmission modules, phase matched with the states of at least one first alarm variable, - a step of transmission of data for setting of the first alarm variable evaluated, by the first terminal executing a first data transmission program, - a step of activation of the alarm transmission module when the evaluation module detects a state of emergency, the first alarm variable being set to a state representative of a state of emergency.