Abstract: The present invention relates to a method for sharing secure data between players (5) on a net said method comprising a cryptography step for data using an asymmetrical cryptographic method with double keys, each player (5) having at least one said double key. The method includes a step for initializing (STP1) a blockchain that includes an operation for storing, at least one initialization block (26) in the blockchain by a predetermined authority using at least one computer, said at least one initialization block (26) comprising at least one said transaction (36) that includes an identity record (84) of a major player, said authority no longer intervening at the end of the initialization step (STP1) at least outside a reinitialization step of a player.

Abstract: The present invention relates to a method for sharing secure data between players (5) on a net said method comprising a cryptography step for data using an asymmetrical cryptographic method with double keys, each player (5) having at least one said double key. The method includes a step for initializing (STP1) a blockchain that includes an operation for storing, at least one initialization block (26) in the blockchain by a predetermined authority using at least one computer, said at least one initialization block (26) comprising at least one said transaction (36) that includes an identity record (84) of a major player, said authority no longer intervening at the end of the initialization step (STP1) at least outside a reinitialization step of a player.

Abstract: Equipment items installed on board vehicles and more particularly to a method for operating such an on-board equipment item, the method including an on-board micro software program that is executed during power-up of the on-board equipment item to achieve secure processing with the aid of sensitive security data. In particular, the method includes connecting a secure module including the sensitive security data necessary for secure processing to the on-board equipment item, and authenticating the secure module by the micro software, in such a way as to furnish the micro software with the sensitive security data for subsequent execution of the secure processing.

Abstract: A method and system for processing or authenticating an operating computer file of an equipment item installed on board an aircraft. The method includes generating a first private key according to a scheme based on an identity of a first entity, the first private key being unique to the first entity. The method also includes signing the computer file using the first private key and transmitting the signed computer file to the aircraft through a network without a digital certificate that certifies the identity of the first entity. The method further includes verifying the signature of the signed computer file from a first public key determined according to a scheme based on the identity of the first entity, without using the digital certificate that certifies the identity of the first entity.

Abstract: The present invention relates to equipment items (10) installed on board vehicles (50) and more particularly to a method for operating such an on-board equipment item (10) which method comprising an on-board micro software program (22) that is executed during power-up of the on-board equipment item to achieve a secure processing (E114, E208) with the aid of sensitive security data (24). In particular, the method comprises connecting a secure module (40) comprising the said sensitive security data (24) necessary for the said secure processing to the said on-board equipment item (10), and authenticating (E112, E206) the secure module (40) by the micro software (22), in such a way as to furnish the said micro software (22) with the said sensitive security data (24) for subsequent execution of the said secure processing.

Abstract: The present invention relates in general to the security of computer files installed on board an aircraft and in particular to the mechanisms with which the authenticity thereof, or in other words the origin and integrity, can be guaranteed. According to one embodiment of the invention, a method for processing an operating computer file (100) of an equipment item installed on board an aircraft (110), especially for ensuring the security thereof, the method comprising the digital signature of the said computer file by means of a least one first private key (124, 124?), the said first private key being generated according to a scheme based on the identity (122, 122?) of a first entity (120, 120?). The method may also comprise the multiple signature of data and/or the generation of composite private keys from a plurality of dedicated key generating centers. The invention is also aimed at a system and a corresponding method for authentication as well as an aircraft equipped with such a system.