Abstract: A piece of electronic equipment including a first subsystem such as a touch-sensitive tablet and a second subsystem such as a payment terminal. The first sub-system embeds a first operating system for managing the power consumption of the first subsystem. The second subsystem embeds a specific and secure operating system capable of executing payment transactions. Since the two subsystems execute two different operating systems, an operating state of one of the subsystems may not allow the required service to be implemented if this requires the use of resources implemented by both of the two subsystems. Thus the first and second subsystems exchange data relating to their respective operating state and, where appropriate, change their current operating state as a function of the data relating to an operating state of the other subsystem thus exchanged.

Abstract: A piece of electronic equipment including a first subsystem such as a touch-sensitive tablet and a second subsystem such as a payment terminal. The first sub-system embeds a first operating system for managing the power consumption of the first subsystem. The second subsystem embeds a specific and secure operating system capable of executing payment transactions. Since the two subsystems execute two different operating systems, an operating state of one of the subsystems may not allow the required service to be implemented if this requires the use of resources implemented by both of the two subsystems. Thus the first and second subsystems exchange data relating to their respective operating state and, where appropriate, change their current operating state as a function of the data relating to an operating state of the other subsystem thus exchanged.

Abstract: A method for loading an information-processing resource by a device having a processor and a random-access memory having the steps of: obtaining at least one address corresponding to at least one block of data within which the resource is at least partially recorded; and for said at least one previously obtained current address: loading a current block of data as a function of said current address; obtaining at least one reference certificate of the current block of data; obtaining at least one current certificate of the current block of data, said reference and current certificates being encrypted digital signatures of said current data block; issuing an assertion of validity as a function of said reference and current certificates when said reference and current certificates are identical; copying said current data block into the random-access memory, when said assertion of validity is positive.

Abstract: A method for loading an information-processing resource by a device having a processor and a random-access memory having the steps of: obtaining at least one address corresponding to at least one block of data within which the resource is at least partially recorded; and for said at least one previously obtained current address: loading a current block of data as a function of said current address; obtaining at least one reference certificate of the current block of data; obtaining at least one current certificate of the current block of data, said reference and current certificates being encrypted digital signatures of said current data block; issuing an assertion of validity as a function of said reference and current certificates when said reference and current certificates are identical; copying said current data block into the random-access memory, when said assertion of validity is positive.

Abstract: A method for secure viewing on a screen of an electronic terminal includes determining a mode of operation, secured or open, of the terminal; and modifying the displaying of at least one indicator representing the mode of operation of the terminal. The displaying modification is controlled by at least one secure processor of the terminal and takes into account at least one predetermined action of the user on the terminal and/or of an expiration of at least one predetermined time limit.