摘要:
The invention concerns an architecture for securely accessing virtual objects (Obvi) distributed in systems connected to the Internet (RI), and for obtaining an instance therefrom. Said access is performed, via a smart card (2a), through a 'WEB' browser (10). The terminal (1) and the smart card (2a) comprise each a specific protocol layer (13, 23a). The latter contains intelligent agents (132, 232a1) for setting up two-way data exchange sessions, thereby enabling the smart card (2a) to have a 'WEB' server functionality. The smart card (2a) also comprises intelligent agents, called script translators, and a virtual file management system (8) co-operating with a specialised script translator intelligent agent (7). Each virtual object (Obvi )is associated with a virtual file of the virtual file management system (8). The specialised intelligent agent (7) presents to the browser (10) the list of accessible virtual objects (Obvi) and generates methods for accessing said objects.
摘要:
The invention concerns a method for activating (Ai) applications (A1-An) of an on-board system, in particular of a chip card (2a) connected to a terminal (1) provided with a reader, via a WEB -type browser. The terminal (1) and the chip card (2a) comprise each, besides the conventional protocol layers (101-102), corresponding to the ISO 7816 standards, a specific layer (13, 23a). The latter comprises intelligent agents (132, 232a1) for setting up two-way data exchange sessions, thereby enabling the chip card (2a) to have a WEB server functionality. Moreover, the chip card (2a) comprises intelligent agents (ATS1-ATSn), called script translators, interacting with the applications (A1-An), thereby enabling to activate a selected application (Ai), using conventional orders, corresponding to ISO 7816 standards. In another embodiment, provision is made for dynamic updating of the chip card (2a), in particular from a browser. The invention also concerns the corresponding on-board system.
摘要:
The invention provides for a cryptographic method for digital signature. A set S 1 of k polynominal functions P k (x 1 ,...x n+v ,y 1 ...,y k ) are supplied as a public key, where k, v and n are integers, x 1 ,..., x n+v , n+v are variables of a first type and y 1 ,...,y k , are k variables of a second type, the set S 1 being obtained by applying (100) a secret key operation on a given set S 2 of k polynominal functions P' k (a 1 ,..., a n+v y 1 , ..., y k ), a 1 ,...,a n+v designating n+v variables including a set of n "oil" and v "vinegar" variables. A message to be signed is provided (105) and submitted (110) to a hash function to produce a series of k values (b 1 ,...,b k ). These k values are substituted (115) for the k variables (y 1 , ...,y k ) of second set S 2 to produce a set S 3 of k polynominal functions P" k (a 1 , ..., a n+v ), and v values are selected (120) a' n+1 ,...,a' n+v for the v "vinegar" variables. A set of equations P" k (a 1 ,...,a n+v )= 0 is solved (125) to obtain a solution for (a' 1 , ...,a' n ) and the secret key operation is applied (130) to transform the solution to the digital signature.
摘要:
The invention concerns an electronic circuit support (9), the electronic support bearing at least one bump contact, the support comprising an insulating element (3, 12) housing the electronic circuit and bearing, on an external surface, a circuit layer defining at least one bump contact (7, 8), said bump contact being designed to be connected to said contact pad. The invention is characterised in that the support comprises at least one brittle zone (5, 6) located in the insulating element (3, 12). The invention is particular applicable in smart cards.
摘要:
The invention concerns a method for producing a predetermined image using a device (40) and a portable object (8), the device comprising data processing means, data storage means, and image processing means, and the portable object comprising data processing means, data storage means, a through window, and display means (17) capable of displaying an image in front of the window. The method consists in: arranging said portable object window in front of the device image processing means such that they co-operate optically between them; producing in front of said window a first image; cause the portable object display means (17) to display a second portable object image; and obtaining the predetermined image by superposition of the first image and the second image of the portable object.
摘要:
L'information confidentielle étant composée de signes appartenant à une première série (3), on définit une seconde série de signes (4), on affiche la première et la seconde séries de signes selon une position relative aléatoire, et on utilise cette mise en correspondance pour saisir l'information confidentielle de sorte qu'un tiers qui observe les opérations de saisie ne peut pas déterminer l'information confidentielle. L'invention concerne aussi le terminal associé à ce procédé.
摘要:
Le procédé de l'invention consiste à inscrire dans la zone de mémoire Ac accessible d'un objet portatif (1), au moins l'information [I] et une image [I'] de celle-ci. Cette image [I'] est obtenue en mettant en oeuvre un programme de chiffrement de l'information [I]. Ce programme prend en compte au moins l'information [I], une première donnée [Ks], externe à l'objet portatif et fournie à des circuits de chiffrement (21) sous le contrôle de la personne inscrivant l'information, et une seconde donnée [Sid], diversifiée pour chaque objet portatif (1). La certification ultérieure consiste à vérifier qu'une image [I'] a été obtenue à l'aide des première et seconde données, pour en déduire que l'information [I] associée est originale.