Abstract: According to one aspect of the present invention, there is provided a method, in a network having access to a billing system, of debiting a subscribers account for a charge-incurring use made by the subscriber of the network, comprising: in response to receiving a request to make a charge-incurring use of the network, requesting authorization from the billing system for the requested use; supplying to the billing system a billing rate identifier indicating a billing rate to be applied for the chargeable use; and indicating to the billing system an amount of time for which the subscribers account is to be debited at the indicated billing rate thereby causing the subscribers account to be debited a corresponding amount, wherein the period between requesting the authorization and indicating an amount of time is less than the indicated amount of time.

Abstract: Disclosed is a method for encrypted communications. A first IPsec endpoint selects a security association (SA) from a security association database (SAD) by using a selector and then extracts an indexing parameter from SA. The indexing parameter is used to determine an active key location from a key storage database (KSD). Data packets are then encrypted using a key from the active key location. The first IPsec endpoint also forms a security parameter index (SPI) in a header of the data packet by using a keyID from the active key location and transmits the encrypted data packet with the header indicating the SPI to a second IPsec endpoint.

Abstract: According to one aspect of the present invention, there is provided a method, in a network having access to a billing system, of debiting a subscribers account for a charge-incurring use made by the subscriber of the network, comprising: in response to receiving a request to make a charge-incurring use of the network, requesting authorization from the billing system for the requested use; supplying to the billing system a billing rate identifier indicating a billing rate to be applied for the chargeable use; and indicating to the billing system an amount of time for which the subscribers account is to be debited at the indicated billing rate thereby causing the subscribers account to be debited a corresponding amount, wherein the period between requesting the authorization and indicating an amount of time is less than the indicated amount of time.

Abstract: Roaming encryption key rekeying apparatus and method comprising a first system key management facility that communicates to a communication unit roaming information is disclosed. The roaming information is encrypted using a first encryption scheme that is decipherable by the communication unit. Further, the first system key management facility communicates to a second system key management facility the roaming information. In this communication, the roaming information is encrypted as a function of a second encryption scheme that is decipherable by the second system key management facility.