Securing Internet of Things with Lightweight IPsec

Real-world deployments of wireless sensor networks (WSNs) require secure communication. It is important that a receiver is able to verify that sensor data was generated by trusted nodes. In some cases it may also be necessary to encrypt sensor data in transit. Recently, WSNs and traditional IP networks are more tightly integrated using IPv6 and 6LoWPAN. Available IPv6 protocol stacks can use IPsec to secure data exchange. Thus, it is desirable to extend 6LoWPAN such that IPsec communication with IPv6 nodes is possible. It is beneficial to use IPsec because the existing end-points on the Internet do not need to be modified to communicate securely with the WSN. Moreover, using IPsec, true end-to-end security is implemented and the need for a trustworthy gateway is removed. In this paper we provide End-to-End (E2E) secure communication between an IP enabled sensor nodes and a device on traditional Internet. This is the first compressed lightweight design, implementation, and evaluation of 6LoWPAN extension for IPsec on Contiki. Our extension supports both IPsec's Authentication Header (AH) and Encapsulation Security Payload (ESP). Thus, communication endpoints are able to authenticate, encrypt and check the integrity of messages using standardized and established IPv6 mechanisms

From curing patients to healing society : the honourable Dr. Edward Che-hung Leong

Dr. Edward Che-hung Leong, GBM, GBS, OBE, JP, a private medical practitioner specialised in urology, was born into a medical family. Leong is well-known to most Hong Kong people for his surgery skills. He has been praised as the Golden Surgeon Leong (金刀梁). He is also named the Master of Public Office (公職王). Since 1988, he has been a Legislative Councilor representing the Medical Functional Constituency, as well as many other public service roles of the Government and quangos, including Chairmanship of the Elderly Commission, in which his works were highly appraised. For years Doctor Leung has enthusiastically engaged in serving the society. Recognising his contributions to the society, the government has awarded him the honours of Justice of Peace, Order of the British Empire, Gold Bauhinia Star, and Grand Bauhinia Medal. Dr. Leong is now serving as the Chairman of the University of Hong Kong Council, Chairman of the Committee on Elder Academy Development Foundation, Elderly Commission and other public service roles. There is an old saying that doctors can be classified into three classes, the best one cures the society; the middle the person; the lowest the sickness. How did Dr. Leong go through the process from curing patients to healing society