摘要:
A process for the dissimulation of concealment of a secret code in a data authentication device by encrypting the secret code by an encrypting function for forming an image of the secret code and storing the secret code image in the authentication device. Beforehand, an encrypting function is chosen such that with each stored secret code image corresponds a plurality of antecedent codes all differing from the secret code, but which, once encrypted by the encrypting function have an image identical to that of the secret code. The secret code of a user has an authentication device in which is stored the secret code image.
摘要:
An electronic device for processing digital data has an input for receiving data to be processed and processor means suitable for transforming the input data in non-falsifiable manner into a result condensed data block. The processor means tools that are simple and fast, such as arrays and logic operators, to provide an elementary anti-collision operation for use in condensing the digital data.
摘要:
This invention relates to an authentication process with an access control and/or payment system that maintains anonymity of the customer towards a third party, characterized in that a single-directional authentication protocol is used to send an authentication sequence that is completely different for each transaction, so that it is impossible for a third party to determine the identity of this customer, or even to determine which transactions are sent by a particular customer.
摘要:
A process for controlling communication between a first and a second smart card using key-based cryptography is provided. In the disclosed process, a first identity code is stored in the first smart card and a second identity code is stored in the second smart card. The smart cards are customized by writing into each of the smart cards an identical group secret key and respective algorithms for processing the identical group secret key and the first and second identity codes stored in the first and second smart cards, respectively. The smart cards are used by transmitting the first identity code to the second smart card, transmitting the second identity code to the first smart card, and calculating using the respective processing algorithms stored in the smart cards, first and second session keys for the first and second smart cards, respectively.
摘要:
A process is provided for authentication in a data processing system using a data processing terminal having a programmable memory. The terminal supplies to a server an identify code (ID), the server checks the identify code, and in the case of agreement, supplies a random number (ALEA-A) to the terminal. The terminal encodes the random number using a signature algorithm (B) defined by a secret key (SID), and supplies a first signed random number (ALEA-S) to the server, which applies a signature checking algorithm (T, B, C) to the number (ALEA-S). The identity code and an encrypted secret key (KID) are written into the memory. The secret key (SID) used for the signature of the random number is determined using a decrypting algorithm (INVA) using the encrypted secret key (KID) and a password (MP) supplied by the terminal user. Particular utility for the present invention is found in the area of data processing, although other utilities are also contemplated.
摘要:
The present invention relates to a procedure for controlling independent secure transactions using a single physical apparatus (11) that is the property of the user, wherein: the user of said apparatus obtains the apparatus independently of any service provider, on presentation by the user of said apparatus (11) to a service provider (P1, P2, P3) said service provider supplies a set of data identifying the user associated with the apparatus for access to a given service (S1, S2, S3) the combination of the apparatus and the data enables a secure transaction to be conducted with the service.
摘要:
The present invention relates to a process for accepting a request for use of a virtual prepaid card involving the following stages:a user of a virtual prepaid card is connected to a server containing a data base, particularly version numbers, which are incremented when the corresponding cards are empty or obsolete,said user is authenticated with the server by communicating thereto an authentication sequence and a version number,said server supplies these numbers to a security processor having the capacity to recalculate the authentication sequence and check the validity thereof,in the case of the validity thereof, the processor transmits to the server a consumption authorization,after receiving said authorization the server gives agreement to the use request, within the limits of the credit remaining on the card and the validity date of the latter.
摘要:
A device is provided for controlling secure transactions using a physical device held by a user and bearing at least one first pair of asymmetric keys, including a first device public key and a first corresponding device private key. The control includes, prior to implementing the device, certifying a first device public key and characteristics data of the physical device by signing with a first certification key, delivering a factory certificate, after verifying that the device private key is housed in a tamper-proof zone of the physical device. At least one second pair of asymmetric keys is generated, including a second device public key and a second device private key housed in a tamper-proof zone of the device. A second device public key is certified by signing with at least the first device private key, delivering a provisional certificate. The factory and provisional certificate are verified using, respectively, a second certification key corresponding to the first certification key, and the first device public key. In case of positive verification, the method includes delivering by a trusted third party a device certificate corresponding to the signature by the provider at least the second device public key and an identifier of the user and the characteristic data of the device.
摘要:
At least one expired decryption key intended to be used for asymmetrical decryption of encrypted data is recovered in a terminal after generation of a cryptographic encryption key/decryption key pair stored in a cryptographic medium such as a microchip card. The expired decryption key is stored in a database accessible to a user of the terminal and encrypted beforehand as a function of the new generated encryption key. In the terminal connected to the cryptographic medium, the encrypted expired encryption key is decrypted as a function of the decryption key stored in the cryptographic medium so that the encrypted data is decrypted as a function of the thus decrypted expired decryption key.
摘要:
This method provides for electronic certificate assignment in a certificate assignment infrastructure distributed in a network. The infrastructure includes at least one certificate server, an identity server and a registration server linked to the network. Prior to a certificate application request, information relating to the identity of a certificate applicant is stored in the identity server, the identity information being accessible by way of an identifier. In this method, an applicant requests a certificate from the registration server; the identifier is dispatched to the identity server; after verification of the identifier, the identity server dispatches the previously registered identity of the applicant, said identity being provided to the registration server; after receipt of the identity, the registration server dispatches a certificate request including the identity of the applicant to the certificate server, and the certificate server dispatches the certificate destined for the applicant.