Abstract: The present disclosure relates to a cryptographic method for enabling access by a user device to services provided by a server in a set of reference areas. The method comprises at the user device: obtaining a set of reference credentials of the server certifying data indicating the reference areas; obtaining a location credential certifying location data indicating the current location of the user device; generating an authentication token comprising a cryptographic proof for proving that the current location of the user device certified by the location credential matches at least one reference area certified by the set of reference credentials; sending the authentication token to the server for accessing the services by the user device in the at least one reference area.

Abstract: The present invention is directed to a handheld companion device, including: a screen, rigid physical connection means, communication means, adapted for setting up and supporting at least one communication link with at least one external computerized system; and a memory storing computerized methods. The present invention is further directed to related systems and methods for automatically rotating contents displayed on such devices, when rigidly attached on a handheld mobile device.

Abstract: An approach for authenticating a user computer, connectable to a mobile network includes a computing device retrieving an attribute credential, the attribute credential certifying a set of user attributes, a device identifier for identifying the user computer to the mobile network, a location credential, the location credential certifying a device identifier and location data indicating a location of the user computer determined by the mobile network. The approach includes a computer producing an authentication token comprising the attribute credential, the location credential, the location data and a proof for proving that the device identifier in the attribute credential equals the device identifier in the location credential.

Abstract: The present disclosure relates to a cryptographic method for enabling access by a user device to services provided by a server in a set of reference areas. The method comprises at the user device: obtaining a set of reference credentials of the server certifying data indicating the reference areas; obtaining a location credential certifying location data indicating the current location of the user device; generating an authentication token comprising a cryptographic proof for proving that the current location of the user device certified by the location credential matches at least one reference area certified by the set of reference credentials; sending the authentication token to the server for accessing the services by the user device in the at least one reference area.

Abstract: An approach for authenticating a user computer, connectable to a mobile network includes a computing device retrieving an attribute credential, the attribute credential certifying a set of user attributes, a device identifier for identifying the user computer to the mobile network, a location credential, the location credential certifying a device identifier and location data indicating a location of the user computer determined by the mobile network. The approach includes a computer producing an authentication token comprising the attribute credential, the location credential, the location data and a proof for proving that the device identifier in the attribute credential equals the device identifier in the location credential.

Abstract: In an approach for authenticating a user computer, connectable to a mobile network, a computer retrieves an attribute credential, the attribute credential certifying a set of user attributes and a device identifier for identifying the user computer to the mobile network. The computer requests a location credential, the location credential certifying a device identifier and location data indicating a current location of the user computer determined by the mobile network. Additionally, the computer produces an authentication token comprising the attribute credential, the location credential, the location data, and a proof for proving that the device identifier in the attribute credential equals the device identifier in the location credential. Furthermore, the computer sends the authentication token for authentication.

Abstract: In an approach for authenticating a user computer, connectable to a mobile network, a computer retrieves an attribute credential, the attribute credential certifying a set of user attributes and a device identifier for identifying the user computer to the mobile network. The computer requests a location credential, the location credential certifying a device identifier and location data indicating a current location of the user computer determined by the mobile network. Additionally, the computer produces an authentication token comprising the attribute credential, the location credential, the location data, and a proof for proving that the device identifier in the attribute credential equals the device identifier in the location credential. Furthermore, the computer sends the authentication token for authentication.

Abstract: A method of transaction authorization, includes, at a server: receiving, from a computerized transaction system, transaction request data responsive to a user having initiated a transaction via the transaction system; instructing to generate a single use, one-time challenge, vocalized by voice synthesis and call a computerized electronic device of the user, using an endpoint identifier linked to the user, the latter enrolled at the server, to vocally communicate the vocalized challenge to the user; and communicating with the transaction system to validate response data sent by the user, in response to the vocalized challenge, to one or both of the server and the transaction system for validation, to authorize the transaction.

Abstract: The present invention is directed to a handheld companion device, including: a screen, rigid physical connection means, communication means, adapted for setting up and supporting at least one communication link with at least one external computerized system; and a memory storing computerized methods. The present invention is further directed to related systems and methods for automatically rotating contents displayed on such devices, when rigidly attached on a handheld mobile device.