Abstract: A cryptographic system (500) includes cryptographic sub-units (510) and associated input buffers (520) connected to a scheduler (530) and a reassembler (540). The scheduler (530) receives packets, where each of the packets includes one or more data blocks, and assigns each of the packets to one of the sub-units (510). The input buffers (520) temporarily store the packets from the scheduler (530). Each of the sub-units (510) performs a cryptographic operation on the data blocks from the associated input buffer (520) to form transformed blocks. The reassembler (540) receives the transformed blocks from the sub-units (510), reassembles the packets from the transformed blocks, and outputs the reassembled packets in a same order in which the packets were received by the scheduler (530).

Abstract: A system facilitates communication among nodes in a wireless network. A timeslot is assigned to each of a group of nodes (201) in the wireless network (400, 800, 1200, 1300). The timeslot is a time for a corresponding node to receive messages transmitted by other nodes (201). A modulation scheme is assigned to each of the nodes (201). A message is transmitted from at least one of the nodes (201), using the assigned modulation scheme, to at least one destination node during a timeslot assigned to the at least one destination node. The messages are received at the at least one destination node from the at least one of the nodes (201).

Abstract: Systems and methods are disclosed for controlling medium access. In one embodiment, the method includes receiving a first message including a first integer; sending a second message including a second integer, the second message sent in response to the first message; receiving a third message including data and a third integer, the third integer serving to authenticate the third message; and sending, in response to the third message, a fourth message including a fourth integer, the fourth message serving to acknowledge receipt of the third message.

Abstract: A hybrid communications link includes a slow, reliable communications link and a fast unreliable communications link. Communication via the hybrid communications link selectively uses both the slow, reliable communications link and the fast, unreliable communications link.