Abstract: A device receives enterprise information associated with enterprises supported by a network, and determines enterprise identifiers for one or more enterprises identified in the enterprise information. The device also receives information associated with devices and subscribers of the network, and determines security key parameters based on the information associated with the devices and the subscribers of the network. The device further generates, based on the security key parameters, a security key for each of the enterprise identifiers.

Abstract: A method includes a network device receiving a request from a user, to deliver a short messaging service (SMS) message, to another user, where the other user is roaming; sending, to a first device, a user registration query; receiving, from the first device and by the network device, a user registration response, where the user registration response indicates whether the other user, in which the SMS message is to be delivered, is registered with zero networks, one network, or two networks; forwarding, by the network device, the SMS message associated with the request, via at least one of the one network or the two networks, when the user registration response indicates that the other user is registered with at least one of the one network or the two networks; and sending to a second device, by the network device, another user registration query, when the user registration response indicates that the other user is registered with zero networks.

Abstract: A first device is configured to receive an instruction to establish a secure connection with a second device or to send a secure message to the second device. The instruction may include a secure connection invitation or a message. The first device may send information, associated with the second device, to a first server; receive a response from the first server; obtain parameters based on the response indicating that the second device is subscribed to the first server; communicate the parameters to the first server; receive a parameters identifier associated with the parameters; store the parameters identifier in the secure connection invitation or the message; and send the secure connection invitation or the message to the second device. The second device may receive the parameters identifier to obtain the parameters to establish the secure connection or to decrypt the secure message.

Abstract: A device receives enterprise information associated with enterprises supported by a network, and determines enterprise identifiers for one or more enterprises identified in the enterprise information. The device also receives information associated with devices and subscribers of the network, and determines security key parameters based on the information associated with the devices and the subscribers of the network. The device further generates, based on the security key parameters, a security key for each of the enterprise identifiers.

Abstract: A method includes a network device receiving a request from a user, to deliver a service messaging service (SMS) message, to another user, where the other user is roaming; sending, to a first device, a user registration query; receiving, from the first device and by the network device, a user registration response, where the user registration response indicates whether the other user, in which the SMS message is to be delivered, is registered with zero networks, one network, or two networks; forwarding, by the network device, the SMS message associated with the request, via at least one of the one network or the two networks, when the user registration response indicates that the other user is registered with at least one of the one network or the two networks; and sending to a second device, by the network device, another user registration query, when the user registration response indicates that the other user is registered with zero networks.