Abstract: The invention relates to a method of coupling a computer program and/or data to a reference system, implementation of the computer program and/or access to the data being carried out by executing software, a group of parameters being associated with the reference system. The method comprises the protection of a value V0 associated with the reference system and necessary for the execution of said software, in alliance with at least one parameter of said group of parameters. The protection of the value V0 comprises the storage of at least one data pair comprising a function g_i of at least one parameter of said group of parameters and a function h_i of the value V0.

Abstract: The invention relates to a method of coupling a computer program and/or data to a reference system, implementation of the computer program and/or access to the data being carried out by executing software, a group of parameters being associated with the reference system. The method comprises the protection of a value V0 associated with the reference system and necessary for the execution of said software, in alliance with at least one parameter of said group of parameters. The protection of the value V0 comprises the storage of at least one data pair comprising a function g_i of at least one parameter of said group of parameters and a function h_i of the value V0.

Abstract: The invention concerns authentication of a user device (10) performed at a user level (13, 14, 12). Based on a known association of the user with at least one sensory content at the user level and at the computer device level, it consists in determining at the device level, a digital content level based on a sensory content associated with the user; then in providing (203) at the user level the digital content thus determined; authenticating the computer device by comparing the sensory content associated with the user to the digital content provided at the user level.

Abstract: The management frame protection method comprises, for the first management frame (7, 8, 9, 10) sent by a first equipment and received by a second equipment, a step of inserting in said first management frame (7, 8, 9, 10) a parameter f(X0) that is an image of a predetermined numerical value X0 as obtained by a mathematical function f that is difficult to invert and that is known to both equipments, and for each kth management frame (7, 8, 9, 10) sent by the first equipment and received by the second equipment: a step of inserting in said kth management frame (7, 8, 9, 10) a parameter f(Xk) that is the image of a numerical value Xk as obtained by the mathematical function f, and a numerical value Xk?1 that was used to determine a parameter f(Xk?1) inserted in a (k?1)th management frame (3, 4, 5, 6); and a step of the second equipment comparing an image of the numerical value Xk?1 as obtained by the function f as received in the kth management frame (7, 8, 9, 10) with the parameter f(Xk?1) received in the k?

Abstract: A method of detecting that a unit communicating with a communications network is sending a large number of frames over that network, said method including a step of analyzing a distribution of the time shifts between frames sent over the network in order to determine if said distribution corresponds to a distribution with memory.