The smart grid is a modernized electrical grid that connects power generation, transmission, distribution, and consumers using information and communication technology. One of the key characteristics of the smart grid is its support for bi-directional information flow between the consumers of electricity and the utility provider. A critical twist on the current electrical grid system is that this kind of two-way interaction would allow electricity to be generated in real-time based on consumer demand and power requests. While the system would give users more control over electricity use and supply, many security issues are raised to ensure the information privacy of the users as well as authorization procedures for electricity use. Security loopholes in the system could in fact, aggravate the electricity supply system instead of improving it. The quality of the information from the perspective of billing and accounting is also a major concern. In this special issue, our objective was to compile the latest advances in the fields of information assurance and information integrity in smart grid systems.