University of North Dakota

Jun Liu

A system and method include an encryptor, a decryptor, and a communication link. The encryptor includes a first processor and a first memory, and the decryptor includes a second processor and a second memory. The encryptor and the decryptor communicate data via the communication link. The encryptor and the decryptor are configured to: exchange public messages comprising keying materials, and calculate a common key based on the keying materials, first private modular integers known only to the encryptor, and second private modular integers known only to the decryptor. The keying materials disclosed in the public messages form an under-determined system of equations in variables of the first and the second private modular integers.

Lightweight key exchange protocol

A method for use with a packet communication network includes receiving a plurality of packets at a sink node, calculating a one-way sink packet inter-arrival time between a first packet and a second packet received by the sink node according to a local sink clock time, calculating a one-way source packet inter-arrival time between the first packet and the second packet received by the sink node according to a local source clock time encapsulated in the first and second packets, estimating a ratio of clock skew between the source node and the sink node as a function of the one-way sink packet inter-arrival time and the one-way source packet inter-arrival time, and performing a calibration action in the network as a function of the ratio of clock skew between nodes.

Growing community of inventors

Grand Forks, ND, United States of America

Jun Liu