Abstract: A system and method for creating a trusted network capable of facilitating secure transactions via an open network using batch credentials, such as batch PKI certificates, is presented. A certificate is bound to a group, or batch, or devices. This certificate is referenced by an activation authority upon processing a request for service by a device. Information regarding the device batch certificate is maintained in a permanent, or escrow, database. A user identity is bound to a device, as a device key is used to sign a user key created on the device in the presence of the user, and a copy of the device key is later used to decrypt the signed user key upon its transmission and receipt.

Abstract: A system and method for creating a trusted network capable of facilitating secure transactions via an open network using batch credentials, such as batch PKI certificates, is presented. A certificate is bound to a group, or batch, or devices. This certificate is referenced by an activation authority upon processing a request for service by a device. Information regarding the device batch certificate is maintained in a permanent, or escrow, database. A user identity is bound to a device, as a device key is used to sign a user key created on the device in the presence of the user, and a copy of the device key is later used to decrypt the signed user key upon its transmission and receipt.

Abstract: The invention concerns clearing by telephone access to a telecommunication network service, the access using a set (SUB1) of identification data (PIN1, IMSI1, MSISDN) stored in an identification module (SIM), access to the service being blocked (B1) in response to an event (WPIN3) or an absence of an event (PIN). The invention proposes using a supplementary set 9SUB2) of identification data 9INSI2, MSISDN) stored in the identification module (SIM) and/or proposes a restricted communication mode (COM SC) for communicating with the maintenance center (SC) when access is blocked for remote clearing of access to the service.